For the most part, I don't use any particular "resources" besides talking to her, reading whatever floats her boat to her and with her, going to library story times, looking things up on the computer that interest her. She likes to create Playdough sculpture and tell elaborate stories with them, etc. I don't sit down and teach her anything: if she is interested I may casually show her something and I think that is fine for her at this age. She knew letter sounds well before two, started simple reading at two, spelling words at two, elaborate puzzles at two, and now at three uses very very sophisticated language, can read "big" words, simple math, etc. She likes to sing and dance and make up songs and shows and paint and draw and so we do those sorts of things and I emphasize enjoying being three since life will get serious and even bleak too quickly.
