I just ordered about 450 buttons for my (clothing) projects. 450 because they come in minimums of 150 per piece, so in fact I have only 3 designs. Yeap.
But look at the beautiful things you can do with buttons!
These are part of my 'studio' board on Pinterest. Found all kinds of cool things to craft over there,
like this piece which I am planning to reproduce for my daughter's room:
And this one as a starter for the next birthday!
Birthday Questions - every year on their birthday you ask the same questions and see how their answers change over the years! Add a pic and make a book out of it.