Vr hand tracking

I am new to Virtual reality how can we do hand tracking using google card board.How can we track player hand in vr using google card board to like touching an object holding and touch a gui

Google cardboard doesn’t have hand tracking capablities.

A workaround would be using a “leap motion” or a simillar sensor, and attach it to the cardboard.

Here’s a guide on using leap motion in conjuction to gearVR (should work similarly with cardboard)