Look whos 50!
This creative idea is funny and nice, based on a saying in Germany. Here, old men becoming fifty are called old sod. So that is what you do:
Buy a little gunnysack and fill it with cotton, nuts, stones and other things. Now you create a very nice old style of writing, ideas can be found in the internet, and use this writing style to prepare the gunnysack. You can either write old sod onto the bag or you choose the longer version of look whos 50. You should try out your writing before you start as your present deserves to be perfect! It is not as simple as it might sound.
After all you can hide some coins and bills between the nuts, stones and cotton in the gunnysack.