I have just been reading a Twinkl book aimed at KS1 children, when I came across the sentence 'Robin got bird poo in their hair and on their boots!' My 7 year old pupil found this very confusing. I have emailed Twinkl about it.
Am I over-reacting, or is this completely unnecessary for a book aimed at such young children? English grammar is tricky enough, without complications like this!