Thames & Kosmos Simple Machines Science Experiment & Model Building Kit, Introduction To Mechanical Physics, Build 26 Models To Investigate The 6

STEM Craft Kit - 25 Engineering Project Ideas - Invention Kit With Over 400Pcs Of Craft Wood, Propellers, Wheels, Hot Glue, Hydraulics And More

Thames & Kosmos Mechanical Engineering: Machines & Vehicles STEM Experiment Kit | Build 20 Mechanical Models, Explore Physics Of Force & Motion |

Thames & Kosmos Roller Coaster Engineering STEM Kit | Design, Build, Experiment W/ Working Roller Coaster Models | Explore Physics, Forces, Motion,

Thames & Kosmos Windbots 6-In-1 Engineering STEM Kit | Build 6 Wind-Powered Bots, No Batteries/Electricity Required | Explore Wind Technology, Gear

Thames & Kosmos Solarbots: 8-In-1 Solar Robot STEM Experiment Kit | Build 8 Cool Solar-Powered Robots In Minutes | No Batteries Required | Learn About

GETAJGHSD 10Pcs Clockwork DIY Toy Mechanisms For Crafting Movement Parts For Projects Movement Accessories Fun For Boys And Girls And Adults

Making Things Move DIY Mechanisms For Inventors, Hobbyists, And Artists

Thames & Kosmos Architectural Engineering | Science Experiment & Model Building Kit | Build 26 Models Of Structures & Structural Elements | A Parents'

VICASKY 6Pcs DIY Clockwork Robot Movement Kits Orange Walking Mechanism For Toys Enhance Problem-Solving Motor Skills For Boys And Projects

EMOON 15-Piece Mechanism Replacement Kit With 16 Hands, Silent Sweep Motor, Battery-Operated For Repair, DIY, Or Custom Projects