Expand your Rigamajig Basic Builder Kit with our Locomotion Add-On Kit to make rolling, spinning, mobile contraptions! Axles and axle bolts enable wheels, propellers, pinwheels, and more to spin freely, while swivel casters provide an immensely versatile range of motion.

Our Locomotion Add-On Kit includes plenty of hexnuts to secure everything, and with eight long lengths of our soft, easy-untie rope, you’ll always have enough to pull, fasten, or practice knots. We can’t wait to see what you create!