In a Christmas cracker is a small compass with a cord which can be hung on a key ring.
I always like to have a compass on my key ring because it helps to remind me where I am. My old keyring -compass fell off and broke. Until now, despite looking everwhere, I couldn't find a replacement. Hurrah for Christmas crackers!
My new laptop, which replaces the PC (now in the studio upstairs), has one drawback: the integral speakers are only adequate if you are not listening to music. The speakers which Santa Claus brought me yesterday raise the Vaio to hi-fi standard. Hurray for auxiliary speakers.