Thank you all. Lots of ideas there.
Umbrella - am looking for a good one as dd11 needs a new one. Looking to find a sturdy one which does not fold/ invert in the wind.
Toothbrush - she has just started to wear braces so need special ones which has got a few spare of.
Will get toothpaste and socks. Looking to get nice fluffy ones. Not found yet.
Annuals - they each have 3 of - One Direction, Little Mix, Horrible Histories, Club Penguin, Tracy Beaker and Moshi Monsters,
Forgot, also have got them 3 x 5 packs of Moshi Moshlings
Mini stapler - good idea, will get
iTunes gift card, also good idea as they may like odd songs from individual artist rather than whoe albums which I buy for them
Have got them 2 years ago the microwaveable cuddles, interlex ones. They have 3 each which they use every night. Safer than actual hot water bottles I think.
They have loads of stationary stuff including pritt stick and tipped as we really stock up on those.
I also last year got them each an automatic pencil sharpener which are really handy. Got from Amazon. Also last year, they had kids plasters, glow sticks/bracelets etc, lipbalms, hair turbans, shower caps, usual undies, iPod covers and headphones, stylus pens, Moshi watch, bath gel, wind up torch,
Love the water bottle idea as dd11 needs a nice teenager one.
Have used most of these ideas already as last year, I made my own advent calendar and bought loads of stuff and split into 24 bags or 48 bags as have 2dd.
Each day, they open a bag and inside had about 4-6 items of these things mentioned therefore still lots of stuff i.e. stationary, hair stuff, etc still left to use hence having problems now. Cost more than normal advent but things were useful and got loads mainly from Wilkinson, pound shop amongst others.
Pls keep the ideas coming. Thank you.