Do you have ice lolly moulds? If not get yourself some and then you could juice fresh fruit to freeze as your ice lollies. You could even freeze fruit yoghurt in the moulds for your children to lick on a hot summers day.
It is best for your childrens teeth to keep the ice lollies as sugar fee as possible. You could even dilute the fresh fruit juice with a little water to reduce the sugars. As fresh fruit is high in natural sugars that will also damage teeth.
I hope this gives you some ideas.