I'm in High Wycombe and there are 2 soft play places. Best bet is to try Moonbase - it's based inside the main Wycombe sports centre, off the main Handy Cross roundabout (just off the M40 exits) Try looking up Wycombe leisure on the net - it's got a timetable on there - but Friday afternoon should be ok. It's close to the main town, there's loads of parking and easy to find. There's another play area called Hopscotch - but it's just the otherside of West Wycombe in a place called Piddington - very popular though. Hope that helps....should be better than having to provide in-car entertainment