materials tube half pipe marbles,golfballs and styrofoam cups
step :1 ball rolls down half pipe
step:2 rolls down the half pipe
step :3 marble rolls down tunnel
step:4 roll marble hits train
step:5 elevator takes marble down and releases it pulls lighter side up
-- Compiled by Tyreshia, Fidele, Elora, and Wonah
Friday, January 29, 2010
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