Closed for Holidays

Our GraviTrack Marble Machine Kit is our newest addition to the Marble-Drop mechanism family. Elegant, swooping hands pass marbles to each other to the top of a sweeping multi-level track, available in either solar or battery configuration! Approximately twice as wide as our spiral Solar or Battery Marble machine kits, the GraviTrack is still desk-top compact but large enough for easy mechanical assembly. Pre-order yours […]

Yes, we're approaching the time of the year when it's the darkest and all you want to do is sip tea and huddle around the ... soldering iron! The first of our specials is the "KHSB1 - Learn Robotics Book Special". It includes a copy of our popular "Junkbots, Bugbots, and Bots on Wheels", plus […]

PCBGrip Cylinder Accessory (4 pack) $7.20 This accessory is great for adding standoffs and rotating elements to your PCBGrip (or Openbeam!). PCBGrip Tri Nut Accessory (pairs) $5.52 Inserting and aligning nuts into Openbeam can be a bit tricky, but this clever, simple tri-nut insert is a simple, effective solution to the problem. T-Bolt Accessory (pairs) […]

Check. This. Out. Don from Ontario sent this video our way, of a marble catapult machine he made that uses the GM18 30:1 Mini Metal Gearmotor. He goes into great detail on the mechanics and engineering, and the action starts around the 3:37 mark. We can't believe how intricate the design is, and can't even […]