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 children.small size 5 cm.