Lovely to have so much feedback.
Interesting to hear someone doesn't like the reindeer food. It seems a requirement at all grottos locally. As I said, I would only be doing one made with bird seed etc... no sparkles/glitter in it.
Suggestions of things like soft play just wouldn't be feasible in the set up we have.
Age range wise we were thinking around 2-12. Obviously younger babies would be welcome with siblings, but the activities would be geared for older than them. And I don't think many children over 12 still want to see Father Christmas, but I could be wrong.
Gift wise, it definitely won't be the value of entry, probably around half. We won't have enough buying power to buy in bulk enough to reduce the cost significantly. However they will be getting a magical trail of lights to walk through to enter, activities to do whilst they wait and then a decent, jolly Father Christmas, with a nice, non plastic tat gift.
I think the range of responses shows how tricky it is to hit the market at a point that suits everyone, but hopefully we will please the majority of people.
I don't think we have any free ones near us, some are a free gift at places like the local theme park but only after paying entrance prices.