[ Universal Interface ] -- Universal interface can connect a lot of engineering vehicles, such as transport vehicle, trailer with bucket, Dumping trailer. [ Multi Function ] -- Multi function free combination inertia sliding, free collocation of variety of trailer and trailers. [ Anti-collision Module ] -- The car head is specially added anti-collision module, while it is practical, it also makes the appearance more aggressive. [ Ability Training ] -- Ability Training: Vision sense/ tactile sensation/ auditory sense/ hand-eye coordination train baby\'s attention、flexibility and concentration [ 60-Day Free Warranty ] -- If the products you received has any quality problem( man-made damage not included), please feel free to contact us firstly by Email, we will help you out promptly and positively. Fit for Age 3+ Kids, a best Party/Birthday/ Christmas gift for developing kid\' s intelligence and practicing ability.