Secret Santa ideas for a 5yo girl

[Tailtwister]

DS is doing a Secret Santa this year in class and has to buy something for a 5yo girl. We're not to spend more than £5. Any ideas?

A little Lego set.
Stationery set with Minnie Mouse, Disney Princess, Princess Sofia, Doc McStuffins
A 'Busy Book' (book with playmat and little toys). They do them for various Disney characters and sell them for around £5 in WHSmith and Tesco.
Magic set.
Operation (the game). Has been heavily discounted recently.
A skipping rope.
Colouring pens and paper.

P.S. I am the owner of a 5yo girl.

Thank you Christmas, lots of really good ideas! Out of interest, where have you seen the Operation game on sale? I saw it the other day, but at full price.

The Entertainer had it for £7.50 last week, but out of stock online.

I'm a regular on the bargains thread and I'm sure it's been even cheaper than that, but it may have been a month or two ago.