You’ll love this really cool STEM toy for kids 9+. Made in the US by Tinkineer.com. Also available on Amazon. Tinkineer’s STEM (Science, Technology, Engineering and Math) kits introduce children and adults to engineering principles and physics concepts through dynamic model kits that are made of wood in America. Each “marble machine” kit is an engaging lesson that is told through the eyes of a cast of characters (the “Tinkineers”) in graphic novella format. A terrific toy for hours of STEM play, a great gift for any occasion!