A perfect example is a tool that has been around for quite a while - the random name picker tool from Class Tools. Random Name Picker
For a couple of years, I used to create a list of exercises on a piece of chart paper which would inevitably be destroyed within a month of being used. Then I decided to use the Name Picker as my exercise list. So now, we have a big die that we roll to determine how many of an exercise or how many minutes of an exercise we do during DPA, and then we use the Random Name Picker to determine which exercise. Kids love the noise and the randomness of the tool, and I love not having to rewrite my chart paper list of exercises.