My friend's wife shipped all of us Jenga pieces to write on and send to him while he's away in law enforcement training for his 30th birthday. My contribution:
"Dear Brian, Happy 30th Birthday! I have not known you for 30 years but I hope to know you for the next 30, and the 30 after that (when we will all be part robot). You're my friend and my brother, and even across the country it's a better life for your part in it. May this block ever be that pain in the butt one that you can never quite get out properly, but also an integral one in providing structural support for your tower, no matter how wobbly and precarious it gets. And if you swallow it by accident may it pass painlessly and without complication. I would carefully avoid that test however, as I am unaware of the properties of this ink, in regards to toxicity or flavor. Before I run out of space remember"
Turns out you can write an awful lot on a Jenga block.