Por si algún profe quiere investigar sobre estas 70 apps y ver si le son de utlidad. Yo uso algunas // The 70 Best Apps For Teachers And Students - Edudemic. These are listed as itunes apps, but I'm sure a lot of them can be found for Android as well.
Q-Tips. Pointillism, grade, Dots upon dots, circles upon circles, maybe do color families . I like the idea of breaking this into sections for each child to complete and then putting the whole thing back together (LS)