A pram and a dummy to represent DD1 and DD2. A blue circle for my birthstone. A horse that I bought after my horse died. First letter of my name. A cupcake for my love of baking. A moneybag that my godmother bought me for luck. Can't think of the others right now.

A safety chain is a must - I never had mine undo on its own but when I tried to take it off, the charms would often fall off so the safety is handy to prevent that. I also have a flat flower charm that is separate and it's used to undo the clasp. I can't get it off without it.