SainSmart Jr. 3D Length: 19.00 cm, Width: 24.00 Height: 6.20 Wood
No splinters, just top-notch quality for lasting DIY creations. Constructed with 112 pieces and 4 marbles, this 3D puzzle is motor-driven and incredibly cool. Gears propel the marbles to the top, sending them racing through different channels.
National Geographic Magnetic Marble Run STEM Building One Size, Multicolor
BUILD ANYWHERE MAGNETS STICK – This STEM marble maze for kids and adults can be built on any vertical magnetic surface like the fridge, lockers, whiteboards, workbenches & more! Publisher: Blue Marble.