C.S.
I found this out by accident. My son always made a mess. I mean he had no control what so ever!!! Husband siad he needed something to aim at. So I got some enamel paint and drained the water in the toilet and painted a little bullseye in the toilet where I wanted him to aim. It worked like a charm. He rarely misses the target area now. The side benefit is when I ask him to "go hit a bullseye" for me, he takes off for the potty and never balks at having to go, where before I would tell him to go or worse, ask him if he had to and he would tell me no or fight me to go because he didn't want to stop what he was doing. Now it is much more like a game. Hope it helps. If you don't want to have something permanent on your toilet, you can try putting a sticker just above the water line and it works too, only sticker will come off and it gets pretty nasty. BTW, my son is truning 3 this weekend, so they are similar in ages.