Combustion Engine Combo - V8 Engine + Inline 6 Engine - Working Model Building set - Stem Science DIY for kids and AdultsLET YOUR CHILDREN GET HANDS ON with the Playz Working Combustion Engine Combo Kit, featuring both the Inline 6 Engine Model and the V8 Combustion Engine Model that actually work! This all in one STEM building set brings mechanical engineering to life through two iconic internal combustion engines, designed for kids, teens, and adults alike. Educational yet incredibly fun, these realistic 4 stroke engine replicas allow builders to assemble cranks,