I have left a comment:
"I am assuming the child is not actually riding the pony? If she is, then it downright irresponsible to put a small child on a pony with no saddle/bridle or HAT!! Are you really that unconcerned about her safety? Even the most saintly ponies can spook or shy and children's heads are a lot easier to break than adults. I can't believe you would put your sisters life in danger like that, your mum can't be too impressed with this display?"
riding "hats" as you call it or helmets .... are for wimps ... oh ... you're in the UK ... never mind .... it fits ...
plain cute and to hell with the health and safety-what if-what if--