Inspire future engineers to build and create real world machines gaining a concrete understanding of the principles that make them work. Constructive Playthings Exclusive Brackitz® constructive engineering playset has 207 pieces to create a variety of structures and simple machines using the principles of STEM. Includes pulleys, cranks, wheels, axles, gears, sprockets, chains, and buckets along with connectors and planks. All pieces are easy to clean with warm water, certified non-toxic, BPA-Free, Lead-Free, and Phthalates-Free. Storage tote included for easy classroom storage. For children ages 3yrs. +.