Carle's books all have an educational element – they teach about animals, numbers, colours and nature – but a big part of their appeal is that they are not didactic or laboured, but light and entertaining. There's warmth and humour there too (Junior )
The natural history is a source for smiles, the illustrations in collage and paint are little works of art (Times Educational Supplement )
What a spectacular picture book!... A treat for all ages (Books for Keeps )
