GraviTrax® Expansion: Lifter WINPOS_Dolls-Barbie Just as space exploration is

Just as space exploration is not for the faint of heart

Intricately illustrated

with the more experienced then able to complete the puzzle on their own

you're sure to enjoy puzzling this idyllic scene

GraviTrax® Expansion: Lifter WINPOS_Dolls-Barbie Just as space exploration isThe 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.