Swop the frogs around so they can get all to the opposite side of the pond!
This little 'test' is (supposedly) part of a second grade computer class in China.
Click on a frog to make it jump to a vacant stone. But you can't jump over more than one frog at a time and frogs can't jump backwards!
Some figure it out right away, others report having to work on it for a week (or more). Some never solve it!
Have fun. If you can't solve it, email me and I'll give you the solution. Took me about 20 minutes!