Here's an image of a snap of the census record
About 1 year later he's seen working in development in the Springfield Armory just prior to WWII. He's apparently a fully capable guy. Had worked as a chicken dealer in the 20's, a weaver at a carpet mill in the '00s, but has no higher than a 3rd grade education. Lives in Springfield, Mass., USA. Born in 1882.
Edit: I also just saw on the census that he said 'yes' to working in the public sector, and 'no' to the private sector.
The WPA in the box undoubtedly refers to the Work Projects Administration. This was a New Deal government agency that directly employed workers to undertake public work projects submitted by local governments. Building facilities to serve the handicapped, like schools or therapy centers, was a common WPA project. Improving existing public buildings to better serve those with disabilities was another common effort. That would explain why your relative was counted as a public sector worker.
Without a handwriting expert I'm having a tough time parsing the rest of the entry. I haven't been able to turn up anything about a 'Handicap Project' in general or in Springfield, but it may be that the project would have been well known as a place for the unemployed to find work at the time.
The first line looks like "Sewing Moccasins" to me. Which has a very WPA sort of feel to it.
Separately, thinking about it a bit, I wonder if the census-taker misunderstood what he said in the second part (a not uncommon occurrence with census records). There was a WPA Handicraft Project, which makes more sense if the first is about moccasins. But I agree that the text appears to say "Handicap."
