They won't eat better cereal. Higher fibre cereal triggers diarrhoea in all three of us, and it's hard, actually, to find an unsweetened low fibre cereal bar rice crispies which I really do think are shite!
Saying that, they actually got cheese and cucumber butties this morning because they've scarfed a jar of PB in 4 days.
Made to eat cereal , yes that always works making a child eat it!! I am a fan of cereal and porridge as it's less fuss, but I'm a lazy cow! My DH would give my children a banquet of waffles, croisants, cereal, fruit and yoghurt and I would have to see if there's a market for pregnant prostitutes to afford such a feast!! I would think, especially if fibre is a concern, you are right to give bread/toast. Actually I would think as their mother you can give your kids a hot dog and a fruit shoot for breakfast if you so desire!!