Play.com have five shaped children's sandwich cutters available at £8.89, with free delivery. This is an amazing price, as far as I'm concerned! A set of three is over £7 at Amazon, and individual cutters are currently reduced to £2.99 each at Amazon too. And to add insult, I just bought the dinosaurs second hand for £2 a few weeks ago!
Well, I know the first thing people always say about these cutters is how they waste so much bread, but if your kids are anything like mine, at the end of the day what you get back is a lunch box full of crusts! At least with the cutters you're preempting that and getting rid of the crusts (mine go into a bag in the freezer to be processed into breadcrumbs from time to time, or bread and butter pudding or whatever!) and save yourself a gross lunch box at the end of the day.
In this set you'll get a butterfly, dinosaurs, a large and small elephant, two dolphins and a heart (cute!) and a transport set, with a train, boat, truck and bus.
Come on now, tell me PB&J doesn't taste better when it's cut up into shapes?!