PC World are clearing out lots of old stock currently and their USB gadgets are among the products that are going.
They have the following going at 97p each:
USB Pig Radio (Product Code: Black 942560 / Pink 292883 )
USB Disco Light (Product Code: 642063)
USB Paper Shredder (Product Code: 103880)
USB Circus Cannon (Product Code: 351542)
There are other items there also so it's worth dropping into your local store to see what's there. Most of them are also on 3 for 2 also, which means you can have an even better bargain.
Stock levels for these are better than the other deals I've posted and they make great stocking fillers.