John Travolta and Kelly Preston celebrate Christmas, despite being Scientologists.Kelly - who attended the Scientology Celebrity Centre's 15th Annual 'Christmas Stories' Fundraiser for the Hollywood Police Activities League youth programmes with their children Ella, seven and five-year-old Jett on Saturday (01.12.07) - revealed the family are looking forward to a white Christmas.She told People magazine: "We go to our home in Maine every year. I'm huge on Christmas. So we're going to go up on the 5th of December. I take the kids sledding, Johnny comes and we all love to sled down the backyard."Ella has already written her letter to Santa, and has asked for a toy horse barn and trailer.Kelly, 45, also revealed she and John are planning to try for a third baby, and hopes it will arrive in time for next Christmas.She said: "We're talking about it, but I'm not pregnant yet. Maybe something like a Christmas present next year."