Tinker Crate STEM / STEAM Science Kit from KiwiCo Comes with multiple projects / project ideas and books about the science concept being explored and detailed instructions. Some of the projects have been assembled and can be deconstructed to build again or used for the project / lesson already built (useful for kids who might not be able to build without assistance.) Some may need materials / tools readily obtained or found at home - tape, rubber bands, balloons, etc. All are in excellent condition and ready for hours more enjoyment! Tinker Crate: STEM & Science Kits for Middle School | Ages 9-16+ | KiwiCo