The only things they had to buy was a nice sturdy poster board from the office supply store and candy from the grocery store. Everything else we had on hand.
Supplies: poster board, candy, craft glue, scrap paper, cricut machine, paper cutter.........if you don't have a cricut machine, hand writing your message is great too.
Also before you go shopping decide on what you want your Birthday Candy Gram to say so you know what candy you will need to buy.
This is a great little project to do with your kidlets.