Showstopping birthday focal point! Giant 3-foot balloon mosaic numbers cost $60+ in stores but only $10 to build at home.

1. Trace & Cut Foam Board Base

Project or draw your number ("1", "2", "5") onto 5mm white foam board and cut with a sharp X-Acto utility knife.

2. Glue 4-Inch Foam Side Walls

Cut 4-inch wide strips of foam board. Score gently around curves and hot-glue vertically along the edges of your number base.

3. Inflate & Secure 5-Inch Latex Balloons

Inflate 5-inch latex balloons in varying sizes (3" to 5"). Use low-temp hot glue or balloon glue dots to nestle them snugly inside!