Judy, hope this does not offend but you are either ultra rich or have more money than sence to pay these exorbitant prices.
Next time you are away on a site without entertainment just look at the way the children find things to do and new friends, we caravan with grandchildren and once on site and set up we dont see them for dust and they are perfectly safe and happy with new found friends.
Last year we were away with the grandchildren and their parents. After the evening meal all the children on site got together for a game of football. This went on way past dark (we were all watching very carefully) the children who had bikes with lights on went and got them and those that didn't went and got torches. By using their brains they used the bikes and torches to floodlight their football pitch. And this cost us absolutely nothing - perhaps a torch battery or two.