Marvel Avengers Age of Ultron Cake Kit. Get in on the action with Earth's mightiest heroes. This epic cake topper includes a gyroscope that lights up as it spins. Place the set on the cake for the party, then remoe the gyroscope and get spinning. Food-safe plastic. 2 piece set. Plaque: 6inL x 5inW x 1 1/2inH, Gyroscope 3 1/2in diameter.