My father-in-law had a great, adult take on Easter egg coloring. He created a bunch of categories (could be anything!). We then colored our eggs.. then he'd go through the categories, for each category we'd put in an egg and announce some reason why it fit the category. He'd declare a winner, who would get some pennies or something. When we were all through the one with the most pennies was declared "winner" but we had a great, laughter-filled time and really didn't care.