I did a small project in the garage this weekend and I used up a box of screws.  The box is small, maybe 4x2x2 and made of paperboard with a small plastic window.  I took a small handful of Oat Hay with lots of seeds, stuffed it inside the box, closed the lid and tied a piece of raffia around the outside.  The bunnies LOVED it.  They would grab the raffia and shake it around, flinging the box around the pen until they managed to get it open and pull out the oat hay

ooo that sounds very cool! Hareiette wants to know if you take commissions :-D

Sounds great! Can you post a picture of it!

yeah i can't really picture what it looks like.

Here is a picture of the box, and da bunz in action attempting to unravel it.

This is a great idea for the Toy Test Page. I'm going to modify it just a tad. I'll post it in a few days.