The "Red Book" by Eugenia Balcells is dedicated to youngest children, especially the ones who just begin to recognize colours. The book is constructed out of some transparent envelopes into which the author put all kinds of little objects from child's sourarounding. One may find there loly-pop, baloons, pensils, flat figures and so on. All of them share one common thing - the same colour, red.
Of course one can imagine yellow book, blue book, green book and so on. Let the child experiment himself and make his own colour book. Help a child to discover a world of colour.