Annabel Karmel has some great ones, including ones to help children start cooking themselves. DS and I have started making stuff since he was 2 or 3 and he finds it really fun - it also promotes his interest in different foods, tasting, smelling, touching.
Also for family meals I found Tana Ramsey's Family Kitchen a great book (she's Gordon Ramsey's wife). There are some lovely recipes for family meals and snacks in it and it's very clearly written and everthing explained.
