My daughter loved the Cat in the Hat when she was three so I thought it would be a perfect theme for her birthday party. It was difficult to find items at the local party store so we had to improvise a bit. By using a few theme colors - red, white and turquoise we were able to pull off a simple Cat in the Hat party.
Cat in the Hat cartoon and books
Most of the items for the party were purchased at a teacher supply store including cutouts and stickers that were used as decorations and cupcake toppers. Other items including napkins and plates were purchased online.
My favorite item was the Thing 1 and Thing 2 cupcakes. I had my local grocery store bakery make cupcakes and then decorate them using turquoise icing and a special tip to create Thing 1 and Thing 2's hair. Then, I purchased Cat in the Hat stickers and stuck them to toothpicks to make cupcake toppers. It was easy and very resourceful. For favors I used red and white gumballs and stacked them to look like the Cat's Hat in a clear bag and tied them with a red ribbon and a thank you tag.
If your child is into a particular show or book pick one or two things from the book and run with it to create a one-of-a-kind party theme. As you look back on your child's birthday parties it will also help you to remember what they were into during a particular time in their life.