yeah it looks like chicken pox blisters, it is a self limitting disease and will clear up in a week or fortnight, initially the fever will be sever and it will cause more prostration and latter it will resolve by itself. as such there is no specific treatment and it is only supportive measures only. consult your GP as these kids are more susceptible to infection it may cause some problems, so a consultation with your GP or a child specalist is a must to confirm the diagnosos and to rule out the secondary infection