Here are a few pictures of my most recent (and, arguably, exciting) project - a giant jenga set completed just in time for our annual Festivus celebration (you know...for the rest of us.) A good time had by all, 40-degree weather notwithstanding.
I used Alder for the blocks, for several reasons: I'm told (by the internet) that regular Jenga blocks are made from it (maybe because it isn't sticky like pine or fir), has an excellent strength-to-weigth ratio (much like the traditional aluminum pole used in Festivus celebrations all over the world), and was the cheapest stuff I could find on New Year's Eve Afternoon (much like the traditional beer consumed during Festivus celebrations all over the world.) Also I wanted something that wasn't so soft it would dent when it crashed, but not so hard or heavy it would cause any lasting injury when the tower fell on you.
All in, I used about 50 board feet, and ended up with 72 blocks. Each block is about 1 7/8" thick x 3 1/4" wide by 11 1/8" long. The dimensions themselves are fairly arbitrary - that was just the best way to get the most out of what I had.