The cake pan and paper goods were purchased at Party City. But the cake pan is available online as well. We had our local bakery make it as a double layer since the pan was so shallow and small. It fed about 25 people. My Aunt used her Cricut machine to make the number sign for me. I used a bamboo kabob skewer taped to the number sign as the stick. I am partial to using these flag style decorations on cakes. I think it adds dimension and you can really personalize your cake.
The plain white gift bags were purchased at Hobby Lobby (in packages of 12) and I used an oval template and colored construction paper for the Hello Kitty face. You could probably use an oval die cut and make it even easier on yourself. I used a circle die cut for the center of the bow and a dimensional adhesive dot to secure it to the bag. I added, "Thank you for Coming, Love Avery" to personalize them.