The final 1st grade project of the year was building marble runs on the walls of the makerspace. This project is perfect for teaching problem solving because they are continuously needing to iterate and make changes. Each group gravitated towards different materials and foil was the real winner for many of them. Materials like paper towel and toilet paper innards, used ice cream pints were also fun additions. Packing tape worked the best but of course the colored duct tape was the use most. But some of the paint did come off the walls as a result so next time I will be changing it to being all packing take.