GraviTrax Dipper marble run the holiday camper van measures

the holiday camper van measures over 3

LEGO City Advent Calendars are packed with inspiration

each of which can be turned on and off

Designed to prevent a summer learning gap and keep kids mentally and physically active

GraviTrax Dipper marble run the holiday camper van measuresDip down from one level to the next! GraviTrax is a unique marble run system featuring hexagonal risers and track tiles that simply fit and stack together, rail tracks that hook into place, and stunt pieces that add exhilarating action. One marble acts as a weight while the bucket waits at the top for another marble to come rolling in. Once it does, it swings down, drops it onto the lower track, and then swings back up to collect another. Meanwhile,