This activity includes 4 templates that your students can colour, draw and write to complete! Download a Free DIY Balloon Mosaic Template Printable PDF Poster with the pattern of any Letter or Number you would like.Make your own Mosaic Balloon Number for your next get together. Check out the 5 easy steps on how to make a mosaic balloon number sculpture. May include: A white cardboard crown shape filled with gold and black balloons. Sharing the easiest DIY for your next birthday. Here is how to make a big foam marquee number that will be a hit at your next party. The College Board is a mission-driven not-for-profit organization that connects students to college success and opportunity.