You will not believe what’s hidden in the woods! Start by looking through the green filter – it will reveal the background on each page. The blue filter will then introduce hidden creatures or perhaps a something scurrying on the floor. Now try the red filter to show what is really hidden – perhaps a cottage or a baby bear. The three colour filters are held on a strong card that allow each page to reveal its secrets. A great investigation book that will appeal to the whole family. Format: Hardback