There are plenty of affordable VR goggles that combine with your smartphone to let you view 3D videos and play virtual reality games. FirstVR goggles let you do more more. They combine with UnlimitedHandLite gesture controllers to bring your hands in virtual environment.
The UnlimitedHandLite controller comes with optical active sensing and a 9-axis IMU. FirstVR is compatible with smartphones 4.7 to 6 inches. You can use it for gaming, AR cooking, and other fun activities.[where to find it]