climbing wall rocks

[elephantfanatic]

Ok, well, my dad has been building us kids this tree house thing, but he wants to put a climbing wall.  But in looking for the little rock things, we discovered we needed about 100 of them, and they're about $2 each. I was wondering if there's any way to make some, i really want to get him some for his b-day, but can't! PLEASE HELP!!!!!!!

[orlandosgurl]

hEeEy ChRyStAl!  
yOu ThOuGhT yOu CoUlD eScApE fRoM mE!
hahah just kidding.
I dunno what you could do. Sorry, you know Im not the creative type!!!!!!!!!