Metal balls race on the unique fischertechnik fl ex-rails through various obstacle courses. Students can control the speed and acceleration of the balls with the use of a launching lever or the pre-tensioned catapult. They can also create a chain reaction, make the balls shoot through loops, run over seesaws or up an elevator with the aid of a counter weight.
Contains 260 components (including 11 fl ex-rails and four metal balls) for building 6 different models. An ideal compliment to the Profi Dynamic—Fun with Physics set (#511932)
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