I think birthdays are meant to be celebrated with balloons and cake. The night before I will put up as many balloons as my dining room ceiling fan/light can hold. I also make or purchase a cake... LOTS of cake. Then, we eat cake for breakfast every morning until the cake is gone. That's why I make or purchase lots of cake.
We may do other things for "significant" birthdays - like for the 10th birthday - the 1st birthday - the 16th birthday - the 6th birthday (because I think 6 yr. olds are amazing!) the 18th, the 21st, and then onto the decades 30, 40, 50, etc.
