Being a beginner myself, I can only tell you what Duolingo does NOT accept. I put, "Pupae saltare in templo possunt" and it was marked wrong. I would think with the relaxed syntax of Latin that it would be okay, but I am not an expert so I did not report it. Hopefully someone with more experience will chime in here.
Since dolls can't dance any way why was my answer wrong. I debated writing your answer first but decided to write In the temple the dolls dance. Truly your response was better English than mine but I thought the concept was silly anyway. Was there a Latin grammar reason, which has escaped me?
The people you're addressing are not here. This is a user forum.
There is nothing wrong with
"In the temple, the dolls dance." The volunteer course contributors can't think of every variation when they manually enter the answer possibilities into each prompt's database. The next time something like that happens, double-check for typos or extra spaces, then flag it and report "My answer should be accepted."
EDIT: "In the temple, the dolls CAN dance."