The Brackitz Wheels and Axles Module is an add-on educational construction kit to the Brackitz Structures module (sold separately). Students can design simple moving machines and then explore STEM concepts measuring distance and speed or experiment with the impact of a variable incline. Designed specifically for the classroom supporting up 4-6 students at one time, this kit includes over 25 free online lessons and activities for grades K-6. A reusable storage bin keeps all the pieces together and organized. Details: Large, durable pieces 196 pieces 25 free downloadable lesson plans Easy set-up instructions Includes reusable storage bin Meets Consumer Product Safety Commission standards For use with Brackitz Structures Set (sold separately) Easy to clean with soap and water For ages 4 and up