I have used a hand crank ice cream machine---LOTS of work. Then I got an electric ice cream machine, that you put the ice and salt on the outside. Then I got a little Rival ice cream machine where you put the inside in the deep freeze and when you are ready to make your ice cream, you put in the mix (smaller quantity than the old fashioned kind) Put in the paddles and top and plug it in. When the motor starts stalling you stop, it's done. Take it out and enjoy or put in the freezer in a freezer container. I just keep the bowl for the freezer in the freezer (chest kind) so when I do feel like it is almost done.
I really recommend ice cream makers for young kids. They love making ice cream. There is a science experience in action. You can also make a little homemade kind with an old fashioned coffee can, and another smaller can that fits well inside (close to the same height but much narrower) add ice and salt and have the kids kick the can around until done.