Looking for a great theme for an adventuresome friends birthday celebration? Consider transposing the digits of their age to recelebrate an earlier birthday in years the second digit of their age is less than the first!!! For example, if your friend is turning 21 you could recelebrate their 12th birthday, If they are turning 31 you could recelebrate their 13th.. Enjoy the opportunity to relive moments that you and/or your friends really enjoyed. Do activities you wish you had done, but did not. If your friend is really adventuresome, you decide whether to make the celebration theme a complete surprise (birthday blindfold and all), somewhat of a surprise or let your friend join in planning all the fun. Of course, you’ll want a great photo album. I’ve provided sample signs for your friend to hold on their 12th birthday recelebration as you make photos. Just change the 21st to their actual age and the 12th to their transposed age to customize the signs for your use.