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On each turn
Also included is a specially designed spring scale so that you can measure how the machines change the direction and magnitude of forces
young and old
What kind of robots can you dream up
challenge game and instructions
Frog Stacking Rings Strategy On each turnMr. Frog will help children learn about colors, counting and sounds! Stack the different rings onto the wobbly base while listening for different noises. Age 12 mo+
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