What is a a website for some good Halloween costume ideas for kids and teens?

Try Party City and Halloween USA.

everyones all time favorite.. http://www.partycity.com is the best. you can probably find any costume you are looking for and stores are all over the world

wwe.com

buycostumes.com and do a search for the spirit halloween store.

You need go no further;;;; Go as a Tampax. bloody great idea!!!

i make my own…one of the cutest i have seen or made …is
the clear plastic bag (like the use for covering washers and dryers)
You put the bag on the kid…..with the opening at the neck….like a turtle neck ….then the legs are fed through small holes cut in the bag……you fill the interior of the bag with small balloons
Add a colorful ribbon around the neck….(also used to close the bag)
and the kid is a Bag of Jellybeans

http://www.allhallowseve.com

http://www.shindigz.com/catalog.cfm?cat=17092&AID=10298153&PID=1708124

Oh for sure check out this link – they advertise as having the Lowest Prices on the Web and still have the same stuff!

I like all the new Pirates of Carribean Costumes they have also.

http://www.costumesandmasks.com/children-costumes.html

http://www.buycostumes.com/CategoryPage/KidsCostumes_129.aspx
The kids section has teen stuff too.
google it too.