I can't imagine the amount of good freeware that is around the web and that you don't know about it. This is the case of Photo! Editor, a program that allows you no only to take your pictures and make them perfect but to create some funny caricatures.
For our Spanish speaking readers I prepared a video about this program that can be found here. Of course, using this program in a TabletPC or UMPC adds an extra fun to the whole creation process.