Mix together the dry, British humor of P. G. Wodehouse, the whimsy of Dr. Seuss, and the absurdity of Gary Larson's 'Farside' comics, and you end up with the brilliant comics of William Heath Robinson. Robinson's works can be tricky to track down in book form, but they are worth the effort. My kids instantly fell in love with this work, despite the fact that some of the British, WWI era cultural references were lost on them. Hilarious, heart-warming, and imaginative.
Note: The volume that I obtained through a used book shop has the same name but different cover.