Waffle Blocks from Super Pet www.petsmart.com - $14.99 Product Description: Create colorful resting and play places in your small pet's home with Waffle Blocks. They snap together in seconds and are made of stain, odor and break resistant plastic that's completely washable. This size is ideal for guinea pigs and chinchillas. RattyRat's Review: These waffle houses are very cute and easy to clean and work well if you have several rats. It would be nice if they were a little more compact. Our rats find it a little roomy with too big of an opening.