Encourage your children's creativity and imagination with the K'NEX 10 Model Building Set! With 130 classic K'NEX pieces, this building toy for ages 5+ is composed of colorful plastic rods and connectors that snap together with a simple "click"! These pieces can be combined together to create a quad copter, a tow truck, a frog and more with just plastic rods and connectors. With 10 building ideas, the included instruction sheet guides your little engineers in constructing truly amazing creations. K'NEX 10 Model Building Set also fosters growth by strengthening hand-eye coordination, fine motor skills, problem-solving skills, and spatial awareness, all while putting them on a path towards greater understanding of STEM subject.