Ah this one takes me back! There are so many variations on this theme-let your creativity go! A simple way to make a cubby house is to put 4 chairs facing each other and keep about 1.5m between them. Throw a large sheet over the top and weigh down the sheets with a pile of books on each seat. To gather or attach other sheets you can use pegs. Old boxes make perfect tunnels. Oh and don't forget a torch, pillows, books and some snacks!