Is your browser (and device) WebGL compatible? Test here.
WebGL has recently become allowable on iOS devices.
Try these with a touch screen device!
A rotating drive wheel from a steam locomotive. A variation on a book example. Notice the readout in the upper left corner that tells how many frames per second your device is generating.
Multiple parts from the wheel assembly of a railroad passenger car. To use the controls to hide or unhide individual parts, this should be viewed on a big screen.