Making Rocks

I did a lot of weird things when I was a kid.  One time in about 2nd grade, my friend and I decided that we would make rocks.  I had heard somewhere that rocks are just made out of dirt and time, so we decided that that we would get some dirt and stick it together with water.  That worked alright for us so we put them on some cement in the sun to dry.

A few hours later we went back to check on our "rocks" to see their progress.  They looked nice and solid so we tried to pick them up.  Unfortunately, they crumbled between our fingers.  I was so disappointed!  I thought we did everything right.  I guess we forgot about pressure and millions of years! :)