In Sarasota Florida a group called Team Sandtastic has taken something that many of us did as kids and turned it into an art form (and a business). I came across these guys while doing research for another subject and was transfixed by what they accomplish using a few ordinary rocks. There's no glue or wires here - just patient, thoughtful stacking.
Team Sandtastic has elevated this skill to performance art which they perform as a business for corporate gatherings. The audience can participate too and with a little coaching from the team can produce their own impressive stacks.
I'm really inspired to go out and make my own rock stacks now. If they can do it then so can I, right?
The Team Sandtastic rock stacking website is here. They also do some very impressive sand sculptures (hence the name) and snow sculptures. You can see those here.