We cut both plain (round) and peanut (egg-shaped) "candies" out of colored construction paper, laminated them and played musical candies. I baked round cakes and egg-shaped cakes
(get a mold for Easter time) and frosted them yellow, red, green and orange. This party was right after Halloween so I actually wore a costume as the host of the party.
All our tableware was in primary colors (cups, plates, etc.) and the rest was m & m theme including the treat bags. We played pin the "M" on the candy and had to guess how many m&ms were in a glass jar.