The Gingerbread Man with Everything is a free site from Sprint that lets kids decorate their own cookies. Lots of candy choices that can be rotated and moved. Icing choices of different colors and size allow the kindergartners to get very creative!
Here is another fun cookie decorating site.
The Design Your Own Gingerbread House game lets kids make their own gingerbread houses.
Jan Brett's site is very cool.
Here is another great gingerbread house site.
This is a great simple version of the story at Starfall.
This is a great interactive story. This site has lots of great gingerbread retelling and sequencing ideas, just do a search for "gingerbread".