See: https://developer.vuforia.com/resources/sample-apps/virtual-button-sample-app

You can get the Virtual Buttons sample here - https://developer.vuforia.com/resources/sample-apps

thank's for reply admin . but i mean not virtual button.

like direct interaction . example im touch object animal 3D in real object. then doing simple animation.

maybe u can help for reference . :

Detecting touch of a real world object (not via screen, but really touching the object as you say),

is only supported through the use of Virtual Buttons in Vuforia (see the Virtual button sample); this however will require you print a target on paper with some virtual buttons in it and attach it to the real object somehow.

If this is not a viable / acceptable option in your case, then I guess Vuforia simply does not support your specific use case.

i think its very interest if vuforia support like that.

okay thank you admin ..