A to Z Categories for a game!?

Me and my daughter play an A to Z game every night, where we go through the alphabet from A to Z and name something for each letter, depending on a category. Example; Girls names, we would go through naming girls names beginning with each letter. It is a great calming down game, but we have ran out of subjects and Categories to do! We keep doing: Boys Name, Girls Names, Shops, Games, Films, Songs, etc. PLEASE HELP! WE ARE RUNNING OUT! :O