Derek Thompson compares teen and adult spending habits across various categories:

I can’t show dollar figures, since the study looks at percents only, so this graph compares the share of spending between teens and adults. Teens spend 14X more of their money on food; 8X more on books and clothes; and twice as much on the entertainment super-category, which includes electronics, movie tickets, concerts, and video games. Basically, this is how we all wish we could spend our money if we didn’t have to worry about a mortgage, insurance, savings, or any of that important “life” stuff.