Bombs Away Birthday Photopolymer Stamp Set is a bit snarky. It came out April 2013.
Like the other photopolymer stamp sets, it sticks easily to the blocks. The stamp itself is clear (though it may get a bit stained from some inks) and is very easily placed exactly where you want it. The sets have all been priced at $13.95.
Print your own Bombs Away Photopolymer Set Case Insert