The four dinosaurs have 6 sensory functions; they can squeak, crunch, and spin. Children can feel the ridged wings of the Pterodactyl, rattle the rings around the Brontosaurus's neck, turn the gears on the Stegosaurus's back, and push down the T-Rex to make it squeak and snap. Toddlers can even discover a baby dino, hidden behind the rotating leaf. The package contains 24 large building blocks. Suitable for children aged 1 year and older.