Cuboro Standard Starter Set for the award-winning wooden marble run. All fundamental elements necessary for the construction of a track system are contained in the starter sets. The various elements can be combined to countless track systems.
This is hands-down the most clever piece of toy design I’ve come across in quite a while. The Dutch designed Toideloi Stackhouse is a modular dollhouse for boys and girls - slot the wooden pieces together to build a house, sky-scraper, village or castle -