Mould King 10130 V8 Engine Model Kit That Works - Build Your Own Surper Car Engine with Manual, DIY STEM Project, Hobby Building Blocks Set for Adults (2718 Pieces)

Mould King 10130 V8 Engine Model Kit That Works - 2718 Pcs to Build Your Own Surper Car Engine, DIY STEM Project for Kids/Teens, Hobby Building Blocks Kit for Adults

Mould King City Aircraft Engine Building Kit - Turbojet Engine Model That Runs with Battery - Mechanical Science Education STEM Toy (2256 PCS)

Mould King 10087 L4 Casoline Engine Building Blocks Kit - 1787 Pieces to Build Your Own Mini Engine That Work - DIY STEM Project for Kids, Teens, & Hobby Kit for Adults