I hate potty training

Jacob is 3 and probably should be potty trained by now, but I'm a realist and know that most kids REALLY aren't ready until about this age, unless of course you can take all day everyday for a few days in a row. Jacob is definitely showing interest, but he just can't figure it out. He'll all of the sudden yell "I have to pee in potty potty" and it's so cute. On Sunday I put some Tigger underwear on him and told him that he needed to keep Tigger dry. About 15 minutes later I hear him screaming "OH NO!!!" I ran up to the kitchen to see him standing in a puddle. I said "Oh no, Jacob. What happened??" He responds with "Tigger Peed!"