5.5.5 Finger Patterns: Once double facts are embedded (and children can count 2 collections, in case they need to do that to help) they could play this game.
6.5.3 Doubles with Dominos pack
Free Addition Game for the Doubles Facts - doesn't have to be doubles. I like this idea for any facts, especially up to 5 for Kindergarten
Flying into First Grade: More FREEBIES!!! Doubles and Weather!!!
2nd Grade Snickerdoodles: Doubles Facts Freebie
FREE doubles fact foldable!
How To Integrate Nursery Rhymes Into Your Classroom Lessons - Whos Who and Whos New
Help your kids have fun while learning their doubles math facts with this Domino Doubles Game from Creative Family Fun
Comments: Great free poster from Mrs. Chappell's 2nd Grade Blog. Very nice visual to help students learn doubles.
Doubles facts interactive notebooking