This is the adorable moment two rare Sumatran tiger cubs emerged from their den for the first time for some playful 'rough and tumble' after being born at Chester Zoo.<br />Twins Alif and Raya were born at the attraction back in January but have only just started to venture out and explore the outside world.<br />Zookeepers caught on camera the cubs taking their first steps outdoors before enjoying some playtime under the watchful eye of proud mum Kasarna.
