One of my DSs loved to look at flashcards at that age especially cards with letters and shapes. He learned his letters and shapes very early, and he would sit and just go through the flash cards and tell me what they were and the color. He used to carry around an orange diamond card.
We also practiced counting at that age.
The magnetic letters and word building toy was fun for both of my twins at that age. We went to children's music classes, and listened to music at home. I kept a lot of paper and crayons around for drawing and writing. One learned how to write letters, and the other had fun coloring.
We bought a chalkboard/dry erase easel, and they used it a lot. My children loved play dough at that age. Also we had a little trampoline. We had a lot of the wooden puzzles, and one of them started doing regular puzzles around that age. They loved to look at books, and if I remember that started liking lift-the-flap books at that age. I read to them a lot during the day, and we used to go the story times at the library.
We played outside a lot. They loved using sidewalk chalk and blowing bubbles. Playing with balls and using riding toys were activities that they did everyday.
