making rock...?

[easternu8908]

does any one know how to make your own rock? is it easy? is it cheap?
thanks for your help!

 

[easternu8908]

????????????

 

[gsellers]

you can make it out of clay also...its totally safe

 

[gsellers]

but i dont know how to make it or how much it costs just offering an alternative

 

[easternu8908]

okay cool thank you!!
please some one who knows the steps help