This is a simple little puzzle that's easy to make, and is a great display piece.
A golf ball is sealed inside a jar full of water, and you simply have to balance the ball on a tee that's glued to the lid. It's not terribly hard to solve, but it does require a steady hand and a fair amount of patience.
We had a puzzle like this kicking around my home when I was a kid, and I wanted to make one for my own kids to have. This is how I did it.
To make this you just need a few things:
*The jar I'm using was a pickle relish jar. It is 3.5 inches tall, and about 3 inches wide.
For a much more challenging puzzle, use a larger jar that allows the ball to fall all the way off of the tee!