I taught the solar system to P4 kids in English. I decided to do everything to scale. Sun was bigger than a basketball which we stuck to the board nearest the window and Neptune ended up outside the door. They were shocked how small the planets actually were. I was asked by one lad why I hadn't put the asteroid belt up. So I explained that they are so far apart from each other and so small, that NASA don't even take them into consideration when sending probes to Jupiter and beyond.
Then blew the ones listening away after asking where they thought the nearest star might be in this scale. Beyond Bangkok. Nice to get some reaction, but science is always best for that.
They are generally discouraged from asking questions as often the teachers can't answer, so lose face, and that can't happen.