My daughter rode for the first time our last trip (we all were able to ride as a family for once even Daddy, who won't ride coasters, enjoyed it but we both found it a little rough) and she is three, however my 7 year old son complained about it being too jerky and decided once was enough whereas his sister wanted to go again, and again! I think at three they are often less afraid and if you begin when they are older they understand what real danger is and may be a little more apprehensive? Dunno!