Not the grade level or subject I teach, but pinning this for my teacher friends who teach little people to see! :)
Numicon and mirrors to solve doubling questions. (Missamyp)
I use this project when I start my multiplication unit to teach repeated addition, groups of, commutative property, and arrays. You could also replace one with a multiplication word problem and picture.
Exploring doubles- they've loved this today :)
Might be a good activity for doubling
First Grade a la Carte: Slides and Ladders Goes Math! Adding doubles and multiplying doubles. FREEBIE
Help your kids have fun while learning their doubles math facts with this Domino Doubles Game from Creative Family Fun