Introduce your children to endless building possibilities with the K'nex Mega Models Building Set! This building set from K'nex comes with 700 different rod and connector pieces, which can be assembled into 3D Mega Model configurations. Kids can follow instructions to create 40 different model ideas including: a Hovercraft, a Light House, a Seaplane, a Cruise Ship, and much more! Help your kids develop a better understanding of STEAM (science, technology, engineering, arts, and math subjects) with easy-to-follow instructions. 700 pieces. 7+ years.