My favorite thing to do is bury colorful letters in a big pail of sand and let the children pick one out, tell me whatever they know about it (name, sound, word that starts with it) and then we try to figure out whose name begins with that sound and give it to them. It is a fun, simple, and easy activity to do on the first day of school with the kinders, as well as a great ice breaker!
Also, here is a Chicka Chicka Boom Boom letter slide. It is a great center activity OR take home activity. Enjoy!