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Bryan Hansel

The simple principle behind a teeter totter, a human-powered pendulum, provides hours of enjoyment for kids on the playground. To make it work, a kid sits on each end, with one pushing himself into the air and the other dropping to the ground. Because a teeter totter operates on a simple principle, ...
Jacqueline Stolz
Jacqueline Stolz • 2 years ago

homemade teeter totter