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GREAT GIFT: A perfect gift or for classroom use
remote control
concrete and even sand
new-big-brother or sister present
Roller Coaster Engineering Dinos & Dragons GREAT GIFT: A perfect giftBuild and experiment with dozens of roller coaster models to make learning the physics of force, motion, and energy as fun as a day at the amusement park. Conduct an action packed series of hands on physics and engineering lessons with an easy, modular building system. Piece together the sturdy frame structures and then attach the flexible track to it to build and test endless roller coaster designs. Experiment by varying the weight of the cars and
