All kids are different. My granddaughter started on the small slides at 2. At 3, I had been watching her go on the "baby" slide, when I noticed she wasn't there. (She was with 3 teen girls.) I see them heading up to the top of the big slide. First teen comes down, and I asked her what was going on.... "She wanted to go on the big one." I asked "You realize she CAN"T SWIM" (she is in a life jacket).... So we stood by the pool, and here she comes, plops into the pool, flips over and starts doggie paddling to the edge. I asked her how she liked it, and she loved it. I asked her about not swimming. She said "The guy up there said to turn on my tummy and just make my hands go." She probably came down it 10 times that day. BUT, she is a very confident child (with some major OCD issues) and loves all things Disney. She tends to think she is a teen.