Resourceful Memes

The grandfather's mathematical genius is showing! By flipping the "20" balloon, he created a "21" for his granddaughter's first birthday. This is what happens when you let mathematicians plan birthday parties—they find the most efficient solution using the minimum number of balloons. Conservation of helium at its finest. Somewhere, a number theorist is shedding a tear of joy at this elegant transformation. It's basically topology meets party planning.