By a number of accessories assembled into a flat car, let children in the hands-on assembly to learn engineering structure, exercise math thinking, in the twist to increase the new play and fun experience! The other four engineering vehicles can be assembled together, which will add more surprises to the play. Assemble - transform - combine into a cool urban architecture Tyrannosaurus Rex, simulating the sound effect of Tyrannosaurus Rex, legs and feet can slide, hiding the screwdriver.