how i made my handy dandy rock cave:
i took a paper cup and cut it in half:

lay it on a towel you dont mind ruining:

paste silicone on the sides on the rocks like this to form a base:

paste the rocks on like this:

keep attaching the rocks until its covered:

Then choose some smaller rocks (lighter colored looks better)

place them in the gaps:

almost done:

Then it will look like this:

let it sit for a good long time, like 48 hours or more for good strength then pull out the paper cup:


and here it is:

and something else i made with the other half of the cup and the extra rocks. you can see it on the right:

and dont use GE silicone... it takes forver to cure and isnt very strong
i took a paper cup and cut it in half:

lay it on a towel you dont mind ruining:

paste silicone on the sides on the rocks like this to form a base:

paste the rocks on like this:

keep attaching the rocks until its covered:

Then choose some smaller rocks (lighter colored looks better)

place them in the gaps:

almost done:

Then it will look like this:

let it sit for a good long time, like 48 hours or more for good strength then pull out the paper cup:


and here it is:

and something else i made with the other half of the cup and the extra rocks. you can see it on the right:

and dont use GE silicone... it takes forver to cure and isnt very strong