Here is a link to a free japanese maple bonsai simulator.
frankforce.com/?page_id=1030

For those times when you just want to prune or mess around with a tree, at the wrong time. If you kill this tree just click the new tree button

I have been playing around with this for a few months now.

yeah that's pretty fun. I enjoyed pollarding the tree.

Never heard of it before, looks like fun!