Sometimes it's not easy introducing children to classical music, particularly if you're not the sort of person who will sit down and listen to music without trying to do something else at the same time. If you recognise this description (for you or for your children) you may well be interested in the "Beethoven's Wig" series of CDs which offers 20 tracks of well known pieces set to very funny words. It's perfect for listening in the car as you can hear a track or two on a short journey rather than needing a long time in which to concentrate all in one go. Like all the rest of my recommendations, they're fun for you as well as the children!