At our latest science club for kids aged 9-12, our theme was technology and design. One of our activities was to make a steady hand game.
It turned out to be one of our most popular events ever, based upon the feedback we got from the kids and their parents. The parents were very impressed of what the kids had managed to build.
The games we made required cutting and shaping plastics, assemblying and soldering the electronics, and shaping and mounting the wire. With some help from the adults, even the youngest ones at 9 managed to make stylish looking, fully functioning toys. The games we made were based upon the instructions from a Norwegian book called "Trigger - teknologi og designboka" (2006) written by Eva Celine Jørgensen, Svein Briså and Rolf Ingebrigtsen.
If you want to make one of your own, and have problems with my native tongue Norwegian, do not worry! There are plenty of kits available at various internet stores; just google buzz wire game or steady hand game.
And if you want to do as we did; make it from scratch, there are options out there for you too. Here are a few, varying in difficulty level: