Party- before of after 3pm

[chanice]

It is a party for 5-6 year olds at soft play. The venue charges different prices before and after 3pm.

I'm not too sure which is the best time.
Could you help me out please?
www.bramleysbigadventure.co.uk/parties2.html

The "before 3pm" price clearly only applies in school term time mon-thur so it is cheaper because it will be a quieter time as only children who are too young for school or who are home schooled can come. For most 5-6 year olds the cheaper slot is not an option.

Otherwise I don't think the price matters much but I would choose a slot so that if the package includes a meal then the meal will be served at a sensible meal time and if it doesn't include a meal then it is timed comfortably between obvious meal times.