I have created a diatonic and chromatic virtual xylophone for PowerPoint. The bars can be removed and added and the two versions can easily be switched. It even remembers what bars you took off or left on.
This can be used on a Promethean Board or SMARTboard and is great when used with the large yarn mallets. The instrument is monophonic and plays as fast as you can click or tap the screen (for touch devices).
Here is a YouTube video PREVIEW of the "Virtual Xylophone" in action: https://youtu.be/NryDWuSLaaA
Another video with me actually playing on a SMARTBoard with yarn mallet: https://youtu.be/ehhwUMVBUVY
Created using PowerPoint 2016
Fantastic for the elementary music classroom!