This Learning Resources Botley the Coding Robot Action Challenge Accessory Set has an impressive 4.5 star rating after 80+ reviews and a Fakespot A grade. It enables kids to create STEM-inspired chain reaction challenges with the included falling dominos, swinging hammers, rolling balls, and more physics-inspired accessories. The set is on sale at Amazon for a low $8.89 with free Prime shipping, which is the lowest price we could find by $11.