human
How to make a water pump?
assistant
Make a Water Pump
1. Gather the materials you need for your water pump, including a plastic bottle, rubber bands, and a straw.
2. Cut off the bottom of the plastic bottle so that it's about 1/4 inch thick.
3. Insert the straw into one end of the bottle.
4. Put the rubber bands around the outside of the straw.
5. Connect the other end of the straw to the spout of the plastic bottle.