Anniversary Sheet Cake Creative/inexpensive Ideas For 1 Year Bookstore Anniversary?

Creative/inexpensive ideas for 1 year bookstore anniversary? - anniversary sheet cake

I opened a small independent bookstore last February and am with my 1st birthday This was a difficult year financially because of the economy, I need ideas for inexpensive but creative way to celebrate and to continue to support me. I thought if he bought a sheet cake from Costco ($ 18) and with balloons and a raffle for a gift certificate.I, wanted to make a hero of the books but can not afford it, what are some creative things can I do ?