wow...3rd birthday cake... Use 2 bundt cakes, chocolate frosting, and M's. Could change this up for other numbers or letters too!
For little kids: instead of a pinata, hang balloons filled with confetti, a few toys and candies. Each child chooses one to pop with a pin. Everyone gets a turn with their own balloon and their own treats!
Fill balloons with water and add food coloring, once frozen cut the balloons off & they look like giant marbles.