GraviTrax Junior: My Jungle Formation once the pressure has a

once the pressure has a greater force than the friction holding the rocket to the launch pad

Includes :

Construct a cool aircraft launcher that flings a model vehicle across the room on a zipline

Requires 2 AAA batteries (not included)

48 welding rods

GraviTrax Junior: My Jungle Formation once the pressure has aWatch your favourite child discover their inner engineer! Now young kids can enjoy the thrill of watching their ball roll through a fun jungle marble maze they made themselves! "GraviTrax Junior Jungle" is an interactive track system for children ages 3 to 7, with pieces sized for little hands. Easy to assemble with tons of possible track layouts for hours of repeat play! Comes complete with instructions, 6 baseplates, 3 marbles, 34 height tiles, 1