These fascinating manipulatives provide a wide range of graduated learning challenges. Children build eye/hand coordination as they link, push and snap the pieces together…then advance to constructing complex objects and designs. You get all 4 sets shown, for a total of 918 pieces. Each set comes in a sturdy, stackable plastic box. Boxes measure 15"l x 10 1/4"w x 6"h. Each set also available separately.