I know we like to get lost in our own world when we craft (I'm often in a Jane Austin film with Mr Darcy - oops, hope my husband doesn't read this!) - just give a little thought to who it's for and what they like.
If they happen to like what you do then brill!!
Be careful with ages, not everyone is loving the whole getting older thing and might not want it on their card (unless they're a little person!)