K'Nex Big Builds

K'Nex Big Builds are the top of the K'Nex construction set tree! The sets contain hundreds of pieces, motors and sound effects and are a couple of feet tall when complete. All the parts are compatible with standard K'Nex so can be used to extend your existing K'Nex collection.

These K'Nex sets will keep kids (or dads) busy for all of a rainy afternoon and each K'Nex Big Build set contains plans for multiple models.