I already did one, but i will leave the other up to you guys to come up with a neat idea. for the first one, i decided against cutting it in half. i cracked a hole in the side (looks kinda neat) and hollowed out the center. it's soaking in my sink right now. i'm going to start some plants that i have grouwing ontop of it and hopefully they will expand out and cover over the entrance a bit.
I got to jump in the shower but i'll make another post with some pictures when i get back!