Dec 3, 2016 - I planned on decorating my son's high chair for his first birthday since that is where he would be performing the most exciting part of a one-year-old's birthday - eating the cake! I was going to make a pennant banner to hang from the high chair tray when I realized that I could make the pennant banner look like monster teeth (to go along with the monster theme) by making each triangular flag white. And then I figured I may as well dress the entire high chair up like a monster because, well, I'm crazy! Read below if you are interested in "monsterizing" a high chair.