For Gaby & color theory-
I also do color theory as young as 4th grade and kids love learning
the "secret" behind color mixing & good color choices. If the attached
project is engaging, they will own it! Also, do that famous color chip
thing: same color chip against two different backgrounds, the kids
will swear it is 2 different colors until you hold the chips together.
Op artists are great to study for color theory.