We're taking our children ski-ing for the first time this year. My DS is 9 and wears glasses all the time. I think i've got all the clothing etc except for goggles. Can anyone recommend any goggles that will fit over glasses for children? he's relatively tall for his age, but slim build. We are planning to hire helmets with the skis & boots, so I'm concerned about whether the goggles i buy will fit with a helmet etc. We haven't skied for a few years, so never used helmets - although we are planning on hiring them this year.