Interesting things at book signing events?

What do you take with you for interest at children's book signing events? Or what is the most interesting item you've ever seen at a book signing?

My friend has made my son a 'Hairy Scary Spider'!
He looks sooooo like 'Hairy' from my children's picture ebook.
He's to be used at 'meet the author' and publicity event because children love to interact with the characters from my children's stories.
http://www.amazon.co.uk/Spider-Childrens-Rhyming-Picture-ebook/dp/B005HFHI26

Here's a photo of him with my little boy...