Boots Soltan kids protect and Moisturise skincare lotion for kids which is spf50+ is what I use for my kids especially during the summer when the school request for them to use it from home.
They actually are attracted to the packaging of the sunscreen, it is a blue top and yellow down, and they were always happy to apply it themselves.
It is affordable and works for them and they do not have burnt or irritation on their skin.
My children are happy with the beautiful smell that it gives and it is tolerable and not too strong for them