Aunty Biscuit is raking through a tub of buttons looking for six that match.  She was saying that as a child playing with the button tin was an enjoyable pastime -Hmm.  They were also passed down the generations, double Hmm.   Button collections are generally built up (or added to) over a number of years and invariably you can spend ages looking through them for a project only to there is one less than required for it, or the perfect colour is the wrong size.  Perhaps someone should tell her about Velcro?  That said, if you want to start your own button collection you need a button and a container to put it in. Add buttons at regular intervals and hey presto.