3 times!!!!!!!!!

Yesterday when i picked Seth up from daycare he was in the bathroom with his pants down. I asked the teacher if he just went pee pee on the potty and she said that this was his third time today!!!! I couldn't believe it and was so happy. Seth was pretty proud of himself to and kept showing me his 3 stickers that he got for going on the potty. I guess we are definitely going to have to start some formal training...like soon! I think he is ready. Does anyone have any suggestions on the best way to potty train (books, etc)?