GraviTrax Accessory - Color Swap boogie-board and security engineer in 40

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GraviTrax Accessory - Color Swap boogie-board and security engineer in 40Abracadabra, presto, chango your marble run just added some colorful, magical fun with the GraviTrax Color Swap accessory! Bring a new element of surprise into your GraviTrax marble run! As if by magic, the marble changes color as it passes through the Color Swap. Simply hide a marble within the tunnel the momentum from the incoming marble propels the hidden marble out the other side with the illusion the marble changed colors! Its a snap to combine