One of the projects I attempted (when on the road trip with my family) was to make a GBC module using just the pieces from these sets, as well as A few the LEGO Soccer Balls (which are usually used in a GBC). The two sorting trays go on best. https://4567845667.onzeblog.com/34088540/45678-nhà-cái-things-to-know-before-you-buy