Attaching Eyes?

[shtick]

For the first few puppets I've made (which were pretty aweful) I glued pig pong ball halves to the puppets foam head. I would like to make something a little more resilient.

What is the proper method of attaching ping pong ball halves to a foam head covered in fur/fleece? What about whole ping pong balls?

 

[TopperFraggle]

Someone here mentioned filling the half ball with a little piece of foam cut to fill that space. Then you have more area to make contact with the puppets head. Haven't done whole balls myself, but if I had to guess, I would probably drill a small hole into the ball, insert a piece of wooden dowel and glue it in place, and then insert this into the puppets head. Anyone else?

 

[Buck-Beaver]

You can also forgo ping pong balls completely and just use half-dome eyes which are very easy to attach to a head.