Storage all depends on what birthday treats you choose to put on your birthday charcuterie board. Candies are easy to store. The gum balls, bubble yum tape, popcorn, suckers, and other candies are fine to leave as is. You will want to put plastic wrap over the board to keep it fresher, especially with the small cakes. You can take your time eating the candy (eat the cotton candy faster as it will get stale), but the small cakes should last about 4 days.