This site is full of awesome resources for preschoolers. There are several different themes and each theme has craft ideas, activities, games and other resources. For access to all of the printable resources, it's only $2.15 a month!
When my daughter was 2 1/2 years old I taught her how to use a mouse. I then set her loose on starfall.com. It is full of learning activities for kids. My daughter knew all of her letters and sounds long before she was 3, thanks to this site.
Starfall also has Learn-to-Read phonics books that you can purchase to help your child's reading skills develop even further.
