Keeping Up With The Kardashians star Kris Jenner is offering up a Christmas decorating lesson for charity.The 65-year-old reality star is known for her extravagant holiday season decorations and has teamed up with celebrity floral designer Jeff Leatham and bosses at Airbnb to offer an exclusive decorating class.Kris and Jeff will offer their tips on “more is more” holiday decorating during the one-time virtual experience, and interested participants can book one of 10 spots for $100-per-person.