Go bigger and better and build signal-controlled marble, works with the "GraviTrax Power Starter-Set XXL". Upgrade your mega marble run and automate your track with our "GraviTrax Power Starter-Set XXL". Eight POWER accessories are linked by radio; as one marble finishes the race, another is flagged and sent on its way. Or use the remote control and take charge. The set includes the power trigger, stick, elevator, and switch to create custom, buzz-worthy marble runs. Easy to connect and compatible with all other GraviTrax construction sets. Increase the power of gravity and educational fun today! Our expandable building set uses STEM friendly concepts, as young engineers develop critical thinking and problem-solving skills, and have fun building amazing marble careers. Comes complete with instructions and 142 pieces: 1 Power Starter, 1 Power Finisher, 1 Power Shooter, 1 Power Switch, 1 Power Riser, 1 Power Lever, 1 Power Controller, 2 Tail Tiles, 4 Plates base, 1 large transparent level, 7 balls, 40 high-height tiles, 12 small-height tiles, 2 small-height tiles. 1 curves, 3 Conjunctions, 8 special curved stones, 2 switches, 1 3-in-1, 1 vortex, 3 long tracks, 6 medium plastic tracks, 9 short plastic tracks, 1 finish line, 4 base tiles, inserts for the base tile: 2 catchers, 1 free fall, 1 splash, 1 landing. Requires 11 AAA batteries, not included. Long-lasting durability for girls and boys ages 8 and up, it's the learning toy kids (and smart adults) come back for again and again
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