Award winning Flexiblocks® are easy to snap and hinge together. Flexilinks® make other major brand blocks work with Flexiblock®. Flexiblocks® are proudly made in USA. The Big Builder Set includes 201 pieces: 144 Flexiblocks®, 40 Flexiswivels®, 8 Flexilinks®, 4 Flexiwheels®, 4 axle blocks and storage tub with build-on base lid. Ages 3+. 201 Piece Set Classroom tested and ready for home or school Great for home or school use.