Are you also crazy about airplanes? Then build your own K'NEX Jumbo Jet now! Not only is it incredibly fun and challenging to do, but it also provides hours of playtime. Building with K'Nex stimulates the development of motor skills, coordination, and spatial awareness. The building set contains no less than 57 parts. Suitable for ages 5 and up. K'nex building set Jumbo Jet. This K'NEX build comes with 57 different rod and connector pieces, which can be assembled into 3D configurations. Kids can start with a Jumbo Jet build to learn how K'nex pieces click together and then move on to creating their dream creations. Easy-to-follow building instructions come with the K'nex Jumbo Jet building set. Recommended age 5 and up.