Remote Controlled Duck Discipline Device, otherwise known as a remote controlled off road truck. Works Beautifully to get the ducks moving back to their pen post haste, or to get them out from under the sticker bushes without having to use a long stick. After a few sessions to familiarize them with the device frequently all I have to do is hold the truck out in my hand and gun the engine to get them running for their pen. No more scouring the yard in the pouring rain to get them in, no more hands and knees crawling to get the blue runner from her hidey spot under the bramble rose pile. If you decide to get and R.C.D.D.D. be sure you get one big enough and powerful enough to run through grass and over flowerbeds, most are just meant for use inside on the carpet. I got mine for $12 on clearance at Target, originally $49.95.