These sketch cards are from the original Art Hustle set that came out back in 2010. A few have been posted before, but I don't think all of them have ever been revealed. The bottom ones were cut out so that the card is the shape of the drawing.
When I was little it was fun to clip out drawings and carry them around. They didn't last very long, but I remember it being neat to pretend that they were toys. PVC holds up a little better.