The Very Long Sleep

Fox, Chipmunk, Marmot and Bear are such good friends that they decide to build a forest home and live in it together. But when winter comes, Chipmunk, Marmot and Little Bear take to their beds. Fox can't wake them up at all. Fox is lonely and confused, especially when parcels start to arrive for the other three animals. What on earth can be in them, and will the three friends ever wake up?