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SpaceTime Tunnel DIY Educational Stem Toys with Instruction Book. The SpaceTime Tunnel DIY STEM Exploration Kit introduces children to the wonders of mechanics and motion through an engaging handson project. With its stepbystep instruction book, kids assemble a futuristic rotating tunnel model that strengthens problemsolving, logical thinking, and fine motor skills. The interactive design encourages experimentation and curiosity, helping young learners understand how moving parts work together. Ideal for home learning, classrooms, and STEM clubs, this kit transforms scientific concepts into exciting, creative play.