Build a wind-up sea turtle that actually swims!
Your challenge: to create a wind-up sea turtle that can swim for the longest amount of time!
The specs: Using everyday materials, build a wind-up sea turtle that can swim. This is a tricky challenge, so we have provided some step-by-step instructions in the video below. Make sure you think like a scientist! Try out different materials and designs to find out which one works best. Try making different sized flippers. How big should they be? Try increasing the weight of the turtle. Does this help it balance or slow it down? What else can you do to help your turtle swim?