Make tiny flea harnesses, and attach them to fleas (millions of them.... using prison labour of course as a suitable additional punishment for those who have committed particularly heinous crimes)
One end of the flea harness is attached to a device which produces a tiny burst of electric current when jerked by even a miniscule amount. Place rows of such tethered fleas in a large matrix and parade shaggy dogs continuously in front of them, just beyond their leaping range.
Results.... a Flea-powered source of electricity, and a place to walk dogs. Call it Flea-Lectricity!-- xenzag, Nov 07 2012 Flea_20Harness see also [xenzag, Nov 07 2012] Big fleas have little fleas upon their backs to bite them, and little fleas have lesser fleas, and so ad infinitum.-- normzone, Nov 07 2012 sp. upon their backs to bite em-- pocmloc, Nov 07 2012 actually sp. "and so on, ad infinitum"-- FlyingToaster, Nov 07 2012 Actually, the original has "and so ad infinitum".
But the original original, on which this was based, went:
"The vermin only tease and pinch Their foes superior by an inch. So, naturalists observe, a flea Has smaller fleas that on him prey; And these have smaller still to bite 'em, And so proceed ad infinitum."-- MaxwellBuchanan, Nov 07 2012 ^Flea haff vays of making you tock.-- AusCan531, Nov 07 2012 Check out the Sierpinski flea triangle at the end of this sentence.-- RayfordSteele, Nov 08 2012 Don't you mean Flectricity?-- sqeaketh the wheel, Nov 08 2012 So they're... flea circuits?-- 2 fries shy of a happy meal, Nov 08 2012 Including diodes comprised of tiny one-way turnstiles.-- sqeaketh the wheel, Nov 08 2012 How many vaults?-- spidermother, Nov 09 2012 random, halfbakery