Hiya - as a mom of three, who are now 20, 17 (boys) and 12 (girl) - it doesn't matter what the chairs look like. They could be exactly the same of the very same color and they'll still fight over them - its in the rules of sibling warfare! ::wink::
Anyhow - may I suggest bean bag chairs - they're comfy, kids won't outgrow them, easy to clean if you buy them in a vinyl or machine washable fabric. Kids can't get hurt, ie: no sharp corners, can't fall off of them.
What's more, they can be inexpensive and/or you can make them yourself and/or recover them easily too! Using packing styro peanuts and a king size pillow case/sham,you can make a terrific bean bag for, ummm, peanuts! LOL LOL
Here are a few to compare -
From $1.00+ on ebay:
http://search.ebay.com/bean-bag-chai...sortpropertyZ3
Personalized from $29 @ Lillian Vernon:
http://search.lillianvernon.com/Easy...3%20EDT%202004
Variety galore @
http://www.justbeanbags.com
And more, more, more:
http://search.shopping.yahoo.com/sea...bag+chair&did=
There's my 2 cents for ya - good luck, and by the way.... my kids STILL fight over where they want to sit! LOL!
Enjoy!