Collection: Father-son DIY engine

3D Metal Engine Assembly Model Kit for Science Education Lovers

3D Metal Mechanical Crab Assembly Model Kit-666PCS

3D Metal Mechanical Flying Bird Model for Kids, Teens, and Adults

3D Metal Mechanical Grasshopper Model Kit

3D Metal Mechanical Phoenix Assembly Model Kit with Mechanical Transmission

3D Metal Mechanical Sawtooth Shark Assembly Model Kit

3D Metal Mechanical Scorpion Model Kit Mechanical Assembly Crafts-200PCS+

3D Metal Mechanical Spiky Blue-Green Snake Assembly Model Kit-500+PCS