being 60 seems to be difficult cause the sound of that is - " 60? I'm old" , even though 60 is the new 40. so you need to make her feel young and make it a special birthday as well.
I advise you to make her a day of fun and beauty. Invite her for a day at the spa including massage,manicure, pedicure, a haircut... - the all package, I'm sure she will be very happy.