cherry, we start the day out with a light teeshirt and shorts, will ditch the clothing once we're back inside forthe day as under 6 months o/ recommended that babies cover up with light clothing rather than sunblock (obviously you can cream the bits that stick out if you're not in shade or are planning lots of time outside).
Factor wise, I've always found factor 50 a pain as it tends to be very greasy and hard to put on: I use 30 for myself and the DDs and the occasional 50, and reaapply it. Factor 30 blocks 97% of UV and factor 50 blocks 98.5 so there's not much difference really, plus they both wear off before they wear out, so personally I think you're better reapplying factor 30 every 2 hours than putting on one coat of 50 and forgetting it.
You can buy something called p20 that is meant to give 8 hours protection but it reeks of alcohol and feels like linseed oil: we tried it last year, my DDs hated it And asked me to go back to the usual stuff!!
Last night DS was just in a nappy with windows open and it was still 25 in our bedroom.
Haircuts sound tempting but then you've got to keep them up....doing spmething to boost the spirits is excellent though!