Crafting Tip: When brainstorming birthday card ideas using the collage technique with different media you may run into the problem of "filling out" the entire collage. To alleviate this issue, consider using patterned paper as the background of the collage to fill in any blank spaces ahead of time. Or use a repetitive signature piece of art of fill in the blanks, such as stars, colored buttons, hearts, happy faces, and other embellishments.
One of the best birthday card ideas is to get a big card that has a picturesque front. You can sign in the wishes and your name at its back. Most of the times, people decorate it in their living room or bedroom as a wall hanging. It stays on with them for months & years ahead. This especially works with the teenagers and kids. They love to place their favorite cartoon and fantasy characters in various places in the house.