I'm not sure what their purpose was or even how the game was played, but I definitely played it. They were cute, not all that cuddly and pretty much useless once you got them put together but you just HAD to have them. Why, we may never know.
I don't give books star ratings; I give them bite ratings. This is a bite. A book can get up to five of these evil-looking chompers, including half bites.
You can attribute your own wording to the ratings. Five's the best, three's decent, one and under isn't worth the gas to go to the library. I'll leave it to you to fill in the blanks.