http://pbskidsplay.org/flash2/default.php?page=welcome&lang=en
PBS Kidsplay is a new program from PBS to offer customized play for children. You can try it for free for 15 days and then suscribe for $79 per year or $9.95 per month.
http://pbskids.org/
PBS Kids Org is the main website for the PBS shows your little one watches. Their website offers games, videos, music, and coloring sheets designed around the concepts presented in each show.
http://www.pbs.org/parents/
PBS Parents offers benchmarkers that correpsond to the shows your child watches on a regular basis. There is a teacher's version as well that will offer you the school benchmarks when working with your child as well. All of these can help you prepare your child for the transition from home to kindergarten giving them a heads up.