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Mini Fan DIY Mechanical FerrisWheel Stem Toys with Instruction Book. The Mini Fan Kit introduces children to rotational mechanics through a playful Ferriswheelinspired design. As kids assemble the colorful fan structure, they learn how gears and motion work together to create movement. The instruction book makes the process simple and enjoyable, helping develop critical thinking, fine motor skills, and STEM confidence. A delightful project that combines engineering principles with creative fun.