A 3D play system which includes a head-mounted/headset device. The head-mounted device includes a supporting structure, a first lens, and a second lens. The supporting structure is configured to support two display devices. The first lens is configured to zoom an image displayed by a first display device and project the zoomed image onto a left eye. The second lens is configured to zoom an image displayed by a second display device and project the zoomed image onto a right eye.