Sore back and knees do not have to typify the produce-grower's life. And, family organic farmers don't have to make their kids and employees dislike their jobs either. All it takes is a bike mod like this one to pick those berries in comfort (second view here). The Healthy Farmers, Healthy Profits Project at the UW-Madison,( Wisconsin, USA) came up with the manually powered wheeled cart design shown, along with other tools along a similar line. If you have Power Point or a PPT viewer we highly recommend you take five minutes to download and view the slide show. Solar variations are practically begging to be incorporated into some of the devices, but, the project certainly deserves credit for "getting the bike rolling". The site offers plans for the do-it-yourself builder.