Here is one, it's called an Exerise Block. It's just a plain little block of wood, probably measures 1 1/2 inches all round the edges. The tag says:
Instructions:
1. Place block in center of floor.
2. Walk around it 2 times.
3. Sit down on the sofa.
Congratulations! You just walked
the block twice.
A guy displaying his woodwork at a craft show had these for sale at a $1.00 a piece. Great for stocking stuffers.
The tag is attached with a pretty ribbon.