Has someone ever told you just how specially smart rats are? And you snuffed your nose at them and walked away? Let me be the very first to tell you definitely, as someone who also used to be averse to the idea of owning a pet rat (mainly because their tails seem so horrifying at first, but quickly become their second most adorable part of their body because of how they use them like a monkey does to balance themselves and wrap it around an arm, cage bars, or face when they are climbing down something.) that rats definitely are as smart as you have been told. Not all of them can be the brightest bulbs of the bunch, mind you, but they still are quite intelligent. To make up for a lack of hammocks and accessories to hang around the cage to keep my little ones occupied, I like to give them boxes, usually as a nest box. However, the occasionally empty teabag box makes the perfect temporary solution to being both a food dish and a toy. The boxes must be cardboard, as plastic is bad for the little ratties tummies, and they cannot chew through metal, and it must have a lid that can seal itself in some light fashion, so as to pose as a challenge when closed. Putting treats or straight up food in the box and putting it inside the cage is quite entertaining, as opposed to simply handing them the empty box and saying "Here you go". Placing the open end right side up, but closed, with the food on the inside intrigues the little buggers and they will spend forever trying to figure out how to open the box. They push it around the cage, dropping it from the top level down to the floor, flipping it upside down and all around, pulling on crevices with their little teeth, and licking at the smells that seem like food. I have found that if they cannot open the box conventionally, they become quite impatient with it and turn the whole thing into nesting material simply to get at its contents. They do the same with tissue paper. If they can get their little paws on just a corner of a whole sheet of tissue paper, they will drag it through the bars of their cage, into their nest, and shred it finer than the finest confetti. They also do this with any sort of fabric, paper, cardboard, and anything else that has the faintest possibility of being torn to pieces. Its the most adorable behavior to watch, though when they've gotten their hands on one of your favorite hoodies, its not as thrilling as when its something like a gifted piece of tissue paper...