"Do you get it?" or "Did you get it?”
I ask some kids to guess something. When I show the answer, should I say "Do you get it?" or "Did you get it?”? Or I should say another sentence? Please help me. And many thanks.

Question

Answer

You would say "Did you get it?" because they "just" guessed. Even though it may have been only a few seconds since they guessed, it is still in the near past. So your question should be in the past: "Did you get it?"

You use "Do you get it?" when you are explaining something to someone. Also when telling a joke.

Why did the chicken cross the road? To get to the other side.... Do you get it?