Deci-Blocks™ Group Set includes: 1 set of Hollow Plastic Pattern Blocks (250 pieces) 4 sets of Deci-Blocks™ (52 pieces) in a container with tasks for each set (hollow plastic) 6 Deci-Blocks™ Templates 1 Primary/Junior Deci-Blocks™ Book 1 Intermediate Deci-Blocks™ Book 1 Overhead Deci-Blocks™ Extended Set (85 pieces)