[Ligander]

 I need to prepare a small lecture on chemistry for kids(10-12 y.o.) who have never learned chemistry or learned it for a short time.

 I shall not do any experiments, only the lecture with or without PowerPoint presentation.

 It might be popular explanation of some theoretical chemistry concept, or a lecture on connection of  chemistry to technology, nature or everyday life.

 So far I have 2 suggestions: why does soap washes dirt and what is the difference between physical and chemical phenomenons.


 Any more suggestions?

[Arkcon]

This site has some good tutorials, I really like the way he explains things, very clear.  Try to emulate his style no matter what topic you decide to work with.

http://antoine.frostburg.edu/chem/senese/101/index.shtml