This was a very basic fishing hook that I designed so that the little ones could go fishing and bait their own hooks without having to worry about one of them skewering their finger. Some of the kids were 2 and 3yrs old. These hooks worked out very well and other parents loved them for the peace of mind. They were primarily used to catch crayfish. I doubt they'd work too well for actual fish.
You may want to scale them up just a touch to toughen them up a bit as they are quite thin the way they are now.
I printed about 20 of them and kept a bag for kids.