This may be one of the best things I have been a part of in over 20 years as an educator. Our students made games and goods to sell at an arcade/market. It was so much fun and a great combination of economics and engineering. I've included pictures of some of the games.
With an S hook and a box, one student created a claw game where you tried to pick up bracelets. This was a popular stop in the arcade.
This was a cool variation on the "throw the ball in a hole" game.
The best of this game was the student standing behind it and holding up signs when you made or missed a throw.
An attractive front can go a long way in selling a product.