I just got Fan's candle lit and I went into the Archdruid's tree. I lit one candle in the zodiac and saw that the result was the Stonehenge thing started glowing. When I stuck my hand into the firepit, the narrator said that it tingled with magic.
So I went back, lit them all, and went back into the Stonehenge. I saw there was something in the firepit, so I pulled it out and it turned out to be something I've called a "crying baby" since it was crying and had a bonnet like the babies in the Isle of Wonder.
Confusingly though, instead of a narrator description when looking at it, I heard a different voice saying "No, no, make it stop!" The only other time I got a different voice instead of a narrator description was when I looked at Stick in the Mud and Rotten Tomato. So I tried combining the two, but to no avail.
I've tried taking it back to the Isle of Wonder with the other babies, but nothing happens (except the narrator berating me for trying stupid things). The fact that the "look" icon on it doesn't give a good description confuses me even more. I can't find anything else to do right now, but I figured I got it for solving the candle/zodiac puzzle and so it must have a purpose.