This is a book and I believe a book series that I read while in grade school (12/13-ish years ago). There are several things I don't remember about the book(s), like, for example, if I read more than just one.
But here is what I do remember;
- They are a group of kids that travel to a fantasy realm.
- They travel there through a circle of stones on the ground. Like a circle of large pebbles in a circle.
- They defeat a basilisk, the original image of one i.e. the one that's a mix of a snake, dragon, and a rooster, and not the HP snake.