Our jumbo construction set invites kids to think big…and build even bigger! With offset holes along the entire length of every side, the wooden builders easily connect in countless ways using the safe, chunky nuts and bolts. As kids construct colossal structures, they develop fine motor skills and gain experience with STEM concepts like problem solving and trial & error. Set includes 34 builders (including 8 triangle braces for stability) and 130 rugged plastic nuts and bolts; longest builders measure 36".