I successfully bonded Mr. Bean, my Netherland Dwarf with Peanut (another Netherland Dwarf) and I want to rearrange their cage/x-pen set up.  Where can I find those foam interlocking (like a puzzle) blocks?  I've googled Walmart and Target but can't find them.  Thanks.  I live in the Bay Area.

KragenAuto used to sell them (for garage floors and working under cars) Now those were thicker and only came in black.
Another place I have found them were at Large Athletic stores like Copelands sports. (Used to create exercise mats)

You can also find them online if you google rubber mats or interlocking mats.  

Here's one example http://www.greatmats.com/products/h...160;(note: I've never ordered from there)

What exactly are these things?

I know that Griffin would NEVER leave those alone!  In 2 years of having house bunnies- our remotes were completely fine until Griffin- he ate one button and bit another- and of course it was the TIVO remote and not the cable remote that could be replaced for free.

I would be very careful that they don't dig or chew these mats- it might be too much for some bunnies to resist.  I think 2 out of 3 of mine might be OK- but Griffin gets into absolutely everything.

I bought mine from Target in Walnut Creek in the dorm room stuff/self assemble furniture. It comes in black or white.