This requires a “Jesus Box,” directions for which are found elsewhere on this site
“Through God, all things are possible. Watch now, as I turn this rock into a lemon! (Show the empty Jesus Box and put the rock into it, waving your hands, etc. and ABRACADABRA! (Open the box. Pull out the stone and nothing else. Show the empty box)
Well, that didn’t work, mainly because it wasn’t through God. But if God wanted to, this rock could be anything at all. It could be a lemon or a flower or (dump box filled with small bags of crackers) anything we want. Because that is how God works!