Wotsits - Ingredients Maize, vegetable oil, cheese flavour [cheese powder (7%),flavour enhancers (monosodium glutamate), colour (paprika extract), flavouring], salt.
Quavers - Ingredients Potato starch, vegetable oil, cheese flavour [cheese powder made with animal rennet 0.1%), flavour enhancers (monosodium glutamate, disodium 5'-ribonucleotide), flavouring, colour (paprika extract)], rice flour, soya flour, salt, yeast, onion powder, pepper, wheat flour, colour (annatto).
^^As taken from the Walkers website here
I do give my kids crisps and agree with the others that have said that things in moderation will not harm them.