Google cardboard

At ptengland school we had a google cardboard experience, witch was like a telescope but you could see the real world in the telelscope in the thingy macigy like the great wall of china it is really cool. At school in our maths classes we were lucky enough to have experienced this device. What it is, is a cardboard with magnifying glass on it and a smart phone in the inside. On the screen of the smartphone there is a line between it and it’s like two screens but in one phone.