Transport for London is making it a Christmas to remember with what Londoners forget.
Who hasn't accidentally left something behind when they've got off the Tube or a bus?
Well, among those hundreds of thousands of lost items are brand new toys.
And now some of them will become Christmas treats for lucky children.
Piers Hopkirk explains. He spoke to Paul Cowan, TfL Lost Property Office Manager and Captain Kevin Stanbury from the Salvation Army.