These cars are very realistic, with joints that swing and other features that will certainly keep toddler / kids entertained. Pull back and go friction powered no battery needed pull push forward/ backward. These effects keep toddlers involved in playing with the toy for hours. Playing with these kinds of toys will provide your child with hours of imaginative play. It helps promote hand-eye coordination, sensory reception and motor skills. Best Recommended for 36+ months childre small size 5 cm.