For my daughter's third birthday party we had a Clifford party.  We rented a community room for plenty of space to spread out.  The children did two crafts. One was making a Clifford from a toilet paper roller. (Instructions are here http://www.dltk-kids.com/books/mclifford.html.) Then they made headbands from construction paper. I copied a Clifford face and cut out ears and bands from construction paper. The children really enjoyed wearing them.  For games, we played Pin the Tail on Clifford and Fishing for Bones. For the fishing game, I cut out bones from construction paper and put paper clips on the end of each. The children fished them out of a dog bowl using a magnet on a string. For prizes, I found Clifford water squirters at the Dollar Store and individual packages of Clifford Cookies (the Teddy Grahams brand). Each child got two squirters and two packages of cookies. To keep track of their prizes, each child had a paper bag with Clifford printed on it, along with their names. Goody bags were plastic bags with Clifford on the front and contained two pieces of sidewalk chalk (one Clifford-shaped, one bone-shaped), Clifford stickers and bubbles. A local bakery made us a great-looking cake featuring Clifford in his doghouse and we had all of the matching paper goods, invitations and thank-yous. Ice cream cups and juice boxes rounded out the snacks.