.................

Solutions

Waimataitai School

Definition: What is it? It's a hand washing device that uses very little water and is easy to use. Parts: Describe the parts that make it. What does it look like? · We used four pipes for the water to run through. · Two containers for the water to land in. · We also used a sieve and sticks and a tap. Operations: How does it work? Why? What happens? · The water goes through the pipes. · Then through the sieve and into the container · Then through the little holes into a container which you wash your hands in .Applications: Where and when is it used? · When your hands are dirty · After you've been to the toilet. · You use it in PNG Summary: Why we chose this design It recycles water and is easy to use and people voted for it. What we would do to improve it: · We would put stands to hold the pipe up. · We would use stronger glue to hold the wood up. By Hamish and Tim John Cocks, engineer comments... Effectiveness - It's effective for reducing the amount of water used but in it's self it is not effective in combating the spread of disease (the bugs are very small). Durability - Materials are durable but the construction is fragile (as you have mentioned). User-friendliness - It is a user friendly device. What is it? A handwasher that is durable, stable and easy to use. It washes 10 -20 children’s hands. Describe the parts: A top of a bottle that gets filled with water.The bottom has holes for  the dirty water to run away. The bottles are stuck between two sticks to stop the water running away. Operation: You fill the top  bottle with water.You pull the sipper lid down and it sprinkles out water. You wash your hands underneath.You push the sipper lid back up to stop the water. Application: It is portable so it can be used anywhere.It should be used after going to the toilet, before eating, when hands are dirty Summary: We chose this design because it is simple and easy to use Designers:  Kalm, Ollie and O’Shay John Cocks, engineer comments... Effectiveness - Is good for minimising the use of water and good for washing muddy hands but has limited effectiveness for washing off disease bugs. Durability - It looks a bit fragile but if 10 to 20 children have used and it is still standing - then construction must be reasonably sound. User-friendliness - It's excellent that you tested your device. It looks user friendly. Prof Norris comments... Communication The toilet, sink & kid doesn't really look like what you would find in PNG. However, it is cool how you have used real photos with effects to make your poster. Handwashing-Device by Abby, Emily, Pesi, Tori, Jacob, Tristan and LaZoyea. Definition Our group has made a system for washing our hands. Parts We made a hand-washing device. It is made out of a coat hanger and an upside-down milk bottle. There is a juice lid for the water to come out. It hangs with a rope from a tree. How it works To use the device you hang the washing device on a branch. Put water into the milk bottle. Then open the juice lid and water comes out into the ice-cream container. Close the juice lid. Wash your hands with soap. The water drains with a cork. Where and when it is used Our hand-washing device is for use in Papua New Guinea. They are at a school in the highlands. You use the hand-washing device after the toilet and when your hands are dirty. Also, before eating. Summary We chose this design because it meets the criteria. We used a coathanger because it is waterproof and can be hung from a tree and it is strong. We used a milk bottle because it is big and has a lid at the bottom that can open and close. The ice-cream container is a good size for washing hands in. We would improve our design by using strong rope instead of string. We would look for stronger materials than tape. John Cocks, engineer comments... The project is well thought out and described. Effectiveness - Looks to be an effective device, though it is not clear how the ice-cream container is supported. Effective as a hand cleaner but contaminated hands might contaminate the opening the juice lid. Durability - Construction is robust. User-friendliness - Simple, straight forward device to use. Hand-washing Device by Hunter, Rhian, William, Georgia, Kate and Thomas. Definition Our group made a hand-washing device for people in Papua New Guinea. It is made by children in New Zealand. Parts To make the device we used a milk bottle and a coke bottle taped together by the tops. We used an ice-cream container to wash hands in. We used the L&P lid as a tap. It will have a cork to drain the ice-cream container. The hand-washing device is black and pretty plasticky. How it works To use the hand-washing device you pour the water into the milk bottle. The water goes into the coke bottle. You loosen the lid and then the water leaks out onto your hands. You put soap on your hands and put them under the lid and wash your hands. Turn off the tap. Wait for your hands to dry. Then drain the water out. Where and when it is used The hand-washing device is used in highland schools in Papua New Guinea. It is used after the toilet, before tea and after playing with an animal. It is also used after sport or when your hands are dirty. Summary Our hand-washing device seems pretty simple and we thought it was a good design. It was easy to use because you just have to tip water in and loosen the lid. John Cocks, engineer comments... Effectiveness - it is effective in conserving water and washing hands. You have identified the need for soap. Effective as a hand cleaner but contaminated hands might contaminate the opening the juice lid. Durability - Tape may deteriorate with time. The plastic should be long lasting. User-friendliness - Simple, straight forward device to use. Handwashing-Device by Olivia, Liam, Ben, Keegan and Kelly. Description It is a hand-washing device to help the Papua New Guinea kids to wash their hands. Parts To make the device we used a white pipe, rope, some hose, electrical tape and a large cork. The device looks like a big pipe with a green trunk and hangs on a tree. The white pipe is the body that holds the water. There is a cork in the bottom of the pipe. The tape is to hold the cork tight so it does not leak. The string is for hanging the device and holding up the hose. The hose is for the water to go through. There is a stick to help hold the device in place in the tree. How it works The device works by hanging in the tree. You put the device up in the tree. Then you put the hose down. Next you count to ten while you wash your hands. Rub your hand together with soap. Then hang the hose back up. We do this because we want the children in Papua New Guinea to learn to wash their hands . Dirty water is collected in a container underneath. You tip the water out when you are done. Where and when it is used The device is for use in Papua New Guinea schools in the highlands. Kids will use it after the toilet before eating and when they are dirty. Summary We chose this design because it is simple and easy to use. The device is not leaky and it is strong. The device can hold enough water for 13 children to use. To improve the device we would cut the hose a little bit shorter. We would stop up the cork better with waterproof glue or by melting the plastic. John Cocks, engineer comments... Effectiveness - Well thought out and shows good design principals because it avoids touching the water outlet with dirty hands. The importance of soap has been identified. However, the operation in raising and lowering the pipe may result in higher water use that desirable. Durability - The tap at the base holding the outlet pipe to the white pipe may deteriorate. Looks a solid well constructed device. User-friendliness - An easy to use device. Hand-washing Device by Luke, Riley and Georgia-Rae Definition Our group made a device for people in Papua New Guinea to wash their hands. Parts To make the device we used a juice bottle and an ice-cream container. The bottle hangs upside down from three wooden sticks by wire. The wood is held together by bamboo. There is a twist tap (from a wine cask) on the bottom of the juice bottle. The ice-cream container sits on the ground for collecting dirty water. How it works To use the hand-washing device you undo the juice bottle and fill it from the tank. Next hang it back up and open the lid to let water out. Wash your hands under it, then turn the tap off. Tip out the water when it is full. Where and when it is used The hand-washing device is used in Papua New Guinea schools in the highlands. It is used after the toilet and before eating. Summary We chose this design because it is easy to use because you turn the tap and water comes out. To improve it we would use nails instead of tape to attach the bamboo and have a strong hook for the juice bottle. John Cocks, engineer comments... Effectiveness - A thoughtful device for holding the water container. This will enable the location of the hand cleaner to be readily changed. Durability - Tape may deteriorate with time. The plastic should be long lasting but you have identified that problem yourselves. User-friendliness - An easy to use device. Instructions: Take turns rolling the dice and following the instructions in the squares eg. You washed under your nails, go forward 3 spaces. You didn’t wash for 20 seconds, miss a turn.  You can also land on a ‘Pick up a Card’space. To win you have to collect 6 cards with the hand-washing steps and get to the end.  You can trade cards when you get to the end square. By Emily, Rhian and William Prof Norris comments... Communication - A cool game and very pretty. It's also a non-threatening way of children learning. It's also a great name for a game. By Tristan and Georgia Rae Prof Norris comments... Communication - There seems to be a lot of spare spaces where you could repeat the message about washing your hands. The messages you have written perhaps might not get the message across because they are about the cards rather than repeating the message about washing hands.   This is our hand washer. It is made from an ice cream container, a piece of hose and a shampoo bottle. The hose goes through a hole in the ice cream container into the bottom of the shampoo bottle. We used tape to help stop the leaks around the holes. This is how it works: You need to but the container up higher than the bottle. You put the water into the ice cream container. The water goes down the hose and into the shampoo bottle. You flip the switch on the bottle and then you can wash your hands. This can be used anywhere to wash your hands after you have been to the toilet and before you eat your food. By Caleb, Julia, Robson, Cade & Keith John Cocks, engineer comments... Effectiveness - A clever idea but do you hang it up? Opening the lid with contaminated hands might contaminate it. Durability - Materials are durable but the tape connections may leak after a short time of use. User-friendliness - A simple device to use. Prof Norris comments... Communication - It's cool and artistically done but again the toilet and the basin and the kid don't look like they would in PNG. I really do like the bug/germ though. Handwashing-Device By James, Kinnley, Lucy, Harry and Brittany. Definition Our group made a device for children in Papua New Guinea to wash their hands. Parts We used a sprite bottle (2.25 litres), connected to a juice bottle with electrical tape. The base is a milk bottle container. On top it has an ice-cream container. The juice bottles lies on it's side connected to the sprite bottle. It has a cork to let the water out. How it works It works by the water coming from the ice-cream container down into the Sprite bottle. Pull out the cork in the side of the sprite bottle to let the water into the basin (juice bottle). Wash your hands in the basin with soap. Pull out the cork to drain it. Where and when it is used The hand-washing device is for using in the highlands of Papua New Guinea. It is for children in schools to use before eating, after going to the toilet or whenever their hands are dirty. Summary We chose this design because plastic bottles and containers are easy to get. And we only had tape to connect it with. John Cocks, engineer comments... Effectiveness - A thoughtful combination of containers. Good you are using soap. Durability - Materials are durable but the electrical tape may deteriorate with use. User-friendliness - Reasonably simple to use.