There is no definitive answer to this question as it depends on the individual child. Some 4 year olds may have the coordination and hand-eye coordination necessary to play golf, while others may not. It is recommended that parents assess their child's ability to play golf before signing them up for lessons or buying them their own set of clubs.  If a 4-year old child is interested in playing golf, there are a few things parents can do to help them get started. One is to find a golf course that offers junior clinics or lessons specifically for kids. There are also many instructional books and online resources available that can teach kids the basics of the game. The most important thing is to make sure playing golf is fun for the child, and not just another thing parents are making them do.