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Press the nose to release the water and spin the wheel and watch the waterfall
modular research base and science toy accessories
This durable
75 inches tall
GraviTrax Expansion Building tgtgSP21Pg12 Press the nose to releaseThe Extension Building contains many different basic components to extend the marble run. Combined with any GraviTrax starter set, the Extension Building brings even more variety and ball fun to the GraviTrax universe. How much longer can the ball roll with the new elements? GraviTrax is a flexibly expandable, interactive marble run system for children aged 8 and over: With GraviTrax, children, teenagers and adults don't just build simple marble runs.
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