"DIY Make your own life-size cardboard letters/numbers. Love this! Great for weddings, anniversaries, birthdays, graduations! saving this one for just in case. =)"~ I like how the pinned wrote "life-size" cuz numbers are giant in real life.
For my husband's 40th birthday I mounted pictures from his life onto black cardstock, hole punched them, and tied them to silver strings. Then I had the balloons filled with Helium and attached the balloons to my strings and pictures. We put 5 or so balloons in each corner of the house downstairs (30 altogether). Everyone loved looking at the pictures, they were great conversation starters, and they also were great decorations!