Hi - This may sound silly but how often are children sick? My DS aged 6 seems to be sick quite often, after a cinema trip for example, after a birthday party, or just every month or so - after a tummy ache. It passes quickly and could be excitment or over eating but he just 'goes' all over the carpet (at night) and then straight back to sleep like it didn't happen. Is this normal? Do children 'throw up' like this?!! Otherwise he seems happy!