And while you're there, you can go and see something that I've put in the museum myself...
Things is an endeavour by artist Keith Wilson to update Henry Wellcome's already eccelectic collection. Members of the public can gift or loan items they think should be displayed, and they will be catalogued online before being put in the gallery. Items are catalogued in a calendar of next year's dates. I managed to get mine put on 1st May 2011.
This was my contribution. You can go here to read about my submission, but I'm also quite excited to see that they've been featured on the Wellcome Collection's blog.
If you can't get to the collection to see the Things for real (it's only on until the 22nd October) take a little time to explore what's been submitted online. Some of the Things people have donated are sad, some hilarious, and some just plain bonkers. But all of them worth a look.