By assembling a number of accessories into a digging car, let children learn engineering structure, exercise math thinking in the hands-on assembly, and increase the new play and fun experience in the twist! 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.