Eight is the age where candles stop fitting neatly on a small round cake, and a single 4-inch numeral solves the crowding problem outright. Molded plastic, one piece, pushes straight into the top layer.

Stack it with a 1 for an 18th or a 3 for a 38th, one pick per digit. Sold by the package (1 cake topper) or by the case (12 cake toppers).