Whew! I finally finished making this giant dedication to TNT!
This is a 16x16x16 block cube entirely made of different colored wool. It took a good few hours to make, and it's completely hollow.
Of course, I used command line to get all of the wool to make this! I'm thinking of filling this up completely with TNT, and then, BOOM! I'll think about it, and if I do blow it all up, I'll post the results up here!