No suggestions for using a telescope, but...

About ten years ago I gave a talk about astronomy to my local small, rural primary school -- ages 5 - 12. Just basic things, but things that kept them active and thinking, such as asking them to work out how much of their hands held at arm's length would cover the full moon. Then moon phases and a bit about astronomical distances and the sizes of planets and stars. We went outside with a globe of the earth and formed a circle the equivalent circumference of the sun.

Also showed them a good collection of photos. They enjoyed seeing really good ones of the sun, Orion, our Southern Cross, Omega Centaurii, and of bright, colourful nebulae.

Then we arranged to meet one clear night about 1-1/2 hours after sunset to view satellites. No benefit of internet or Heavens-Above back them, it was just a matter of keep watching. We saw about ten in half an hour and two of them crossed at nearly right angles and got closer together than I've ever seen two at once, before or since. This was a big thrill for them because they thought they might see a crash and an explosion!

The thing that really got me about my talk was that I expected some pretty basic questions, perhaps even some about aliens, but there were none of those and the questions I did get were surprisingly intelligent for such young ages. So I imagine a teacher at a Montesorri school could get some extremely good questions.

[Fixed typo]