Do the Christmas gifts have to be Christmas related? If so, ornaments are the only gifts I can think of.
If it's not vital that the gifts be Christmas related but ONLY Disney related then here are a few suggestions:
For the adults:
Disney themed coffee mugs
Mickey Head Bottle Opener
Box of Disney gormet coffee or hot coco
Disney Themed Coasters: Set of 4 (You know, coasters that keep cup stains off of tables!)
Apparel: Disney themed T-Shirts or sweatshirts
You don't mention how old the cousin's are, but for really young children, a small plush Disney character would probably thrill them!
Keep in mind when shopping how crazy about Disney your extended family and friends are. I shopped for gifts for my in-laws and they don't like Disney. So I bought them a simple ornament, shaped like a star that had various shapes cut in it, including hidden Mickey Heads. The gift didn't shout, "I'm from Disney World!". It was perfect for them.
Diznee25