The TOM Function Machine is an interactive Power Point that will allow your students to visually see a value being inputted into the machine, and an output that results.
You control when the input is entered and when the output is shown, giving you time and opportunities to have discussions with students. After visually seeing input-output relationships, students can guess what the function rule is. Your press a button to reveal the rule and see if students were correct.
See it in action here: https://youtu.be/mhl6D1TIm98
There are 2 functions in this free trial version. Enjoy!