I do the Preschool resource online which is a free online resource containing information related to preschool children, including methodologies, tools, and materials that support diverse kind of preschool activities. You may find there free K12 activities information resources including preschool books and preschool worksheets. This site also lists various internet resources on this issue, all are those classified into kids friendly website.

I also do some free kindergarten teacher resources on the net which -I hope- helps easing kindergarten teachers around the world in finding appropriate materials for their specific works. Most of them are things related to educational system development like free kindergarten curriculum examples and free kindergarten lesson plans; free kindergarten graduation ceremony ideas and kindergarten learning software are also part of this kind of information resource. Such kindergarten site also contains some downloadable materials like free kindergarten math worksheets, free kindergarten coloring pages and free kindergarten puzzles.