SMRT1018 Smartivity 液壓起重機

3D Wooden Model Engineering STEM Building Set for Kids Ages 8 and Up
Explore the wonders of motion, friction, thrust and propulsion by building this hydraulic crane
Once the STEM building set is assembled, kids can push and pull the plastic syringes to direct the crane and lift objects
Includes engineered wooden sheets, bands, assembly hook, hydraulic plastic syringes, tubing, detailed instructions and other parts to make a fully functioning hydraulic crane (water not included)
Made from safe, non-toxic, engineered wood
Easy to assemble, no glue or tools required