20 math signs can be combined into two large robot or a large robot and a large combat vehicle.Note: Some numbers need to be took apart into pieces before Conversion into a combiner robot,please read more on instructions. | Packaging included:10 x Number 0 to 9,10 x Sign.Each of the 10 number can transform to 10 kinds of cars, includes assault vehicle,demolition tank,fighter jet,gargo truck, stealth copter,combo semi,medic shuttle,ammo tractor,rocket launcher and military atv. | Play, explore and learn! Boost number learning and caculation skills as children play without effort!And it develops children's hand-on ability, imaginative ability , creative ability and observation ability. | Made of eco-friendly ABS plastic. Meets child safety standards. Children are play safety.Great gift for kids | Suitable age: more than 6 years old.