Early Finisher activities - Put this in a ziplog bag and make one for each student as an early finish go to assignment. Have them keep the assignments in the ziplog bag for safe keeping. When they complete a row, column, or diagonal REWARD!
Worked great, tried what the article suggests for the purple, still got gray --> Kool-Eggs dyed with Kool-Aid. No vinegar needed, just mix a packet of Kool-Aid with C Water & dunk the eggs until they are the right color.