Download picture book from url: http://clover.studio/dinoar/DinoARPictureBook.pdf and start app. Point camera to marker from picture book and watch dinosaurs come to life.
Click on jungle icon at the top of the screen and watch dinosaurs walk around you. For best experience of this feature your mobile phone should have gyroscope.
If you have cardboard or some other VR headset click on switch button on the bottom of the screen to start VR mode.
Merge into a jungle with DinoAR and VR headset and enjoy full potential of the app. Cardboard V2 is recommended.