Shoutbox

i need to make a good looking powerpoint presentation, the topic being 'My Country', ie India. i was thinking if you can give me some ideas as to how to go about it to make it look good, like some colour schemes, background, animation or stuff. i need about 15-20 slides. also, ill need to run it on a differnet computer in school, so i cant download some plugin or anything.
can u advice me on this?
thanks

(i dont know if this should be in tech-talk, sorry if its the wrong section).