just a heads up, clean off your rocks. you can use bleach since they are non porous. just rinse rinse rinse. and DO NOT BAKE. some rocks can explode in the oven...and that would not be cool hehe.

but like Cheri said. pebbles is a no no. someone posted pictures of their frogs xrays one day and it had tons of pebbles in it. not sure if i can find the thread but i think it was on here. the frog did survive...but small pebbles are no good.