This tug boat science experiment is all about “storing energy” and also about how the paddle moves the boat forward. Kids will have a blast learning about green energy while also playing in water!
– Plastic container with top (we used a margarine container), a plastic lid from another container, acrylic paint, paint brush, toilet paper tube or empty yogurt cup, scissors, super glue, duct tape, rubberband (you will want a few different ones to make sure you get the best fit), craft sticks
Step 1: Super glue the craft sticks to each side of your container. You need a very secure seal, which you can get with super glue. Then duct tape the sticks to reinforce the seal.
Step 2: Take the additional plastic lid and cut out a square shape. Make it the width of the craft sticks. This will become the propeller of your tug boat.
Step 3: Make and attach your wheelhouse with a toilet paper roll or empty yogurt container. If using a toilet paper roll, cut in half. Paint the container and wheelhouse whatever colors your child desires.
Step 5: Put a rubber band around the craft sticks.
Step 6: Cut two slits into the square piece of lid and attach to one side of the rubber band.
Step 7: Put your tugboat in the water and wind up the motor on the back and watch it go!
The key to your tugboat, and what makes this a green energy experiment, is the rubberband. Rubberbands are stretchy and reshape themselves when released. When you change their shape, they are actually “storing” the energy used to change them.
When you let go of the wound rubberband it immediately reverts back to it’s original shape. When it does this, energy is released. It is this energy that moves the boat forward.
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