This collection of photos comes from China. Looks like they used a strong box cutter to slit a mouth in a tennis ball, and added rivets for eyes. The ball could be hung up on a wall with a nail inserted into the mouth, though the back of the ‘head’. But you could just add google eyes with glue. Cute and handy little guy!
![Tennis Ball Helper](https://cdn-ak-scissors.b.st-hatena.com/image/square/f60fdf7ef86d987a740f66702e1e23873425d892/height=288;version=1;width=512/https%3A%2F%2Fdoitandhow.files.wordpress.com%2F2012%2F05%2F20120520225420_vkfue.jpg)