Work Experience is mad fun. Make sure you organise it EARLY, do not leave it to the last minute, or you will end up with some shit job because everything else will be taken. Just ring then up, or go and see them in person. Say something like
Hello, my name is > insert name here < and i attend such n such a high school. I am currently in year 10 and i was wondering if i could do my work experience at your store/place/building/ company, what ever it is. REMEMBER to say, i would like to spend 1 week of MY time with you.
If you get a cool work placement, they might even pay you, if you do a good job. Your not meant to get paid, but i got $50 for the week, being a automotive mechanic. Work experience is really good, gives you a taste of what the real world is like, plus you get a chance to test out any career you are interested. ( except a few ) Plus you might even make some cool / special new friendships.
EG: im good mates with my mechanic now,
Cheers mate,
Good luck with it all.