My friends 3 year old son liked circles. So I planned a party with the theme, "Round."  They decorated small paper plates with thier names for tags.  Games = Pennies in a baby food jar Guess, Played Hokey Pokey, Ring-Around-The-Rosi, Pin the Tail on the donkey (Turn around blind folded). FOOD= cheese and crackers, grapes, sliced cucumbers, cookies ( vanilla wafers ), spaghetti and meatballs. Decorations = balloons, colored circles(later game was to find as many circles as they could plus clean up) Favors = bubbles, toy watch, little ball, sugarless candy, Candy bracelets.