Oh yes!! I thought I remembered your name for something I was discussing! Well, you know my views then. Perfect for 11 year olds!
I made phone/bag charms at my neices party this year. You can pick up the little clips at Hobbycraft with all the jewellery bits and we started with thin ribbon tied onto the clips and went wild with beads and things.
Just in case you're interested, my dd is 13 this year and doesn't want a making party, she wants a posh dinner party cooked by daddy and waited on by mummy!