Skiing can be a wonderful family activity. For first time skiers, plan to go for at least three days, if not more. The learning curve usually lasts a few days, and if you only go for a day or two, there may be some frustration for both you and your kids. Lessons are highly recommended for all novices no matter what age.
Many resorts are family friendly and offer wonderful packages.
Renting skis and boots at the resort is a good idea, but you will need to buy some basic warm outdoor wear like ski pants, a warm jacket, sweaters, gloves, a hat and thick socks. When heading out to the slopes, it's better to layer your clothes, so bring long-sleeve shirts and warm sweaters. Sunglasses and sunscreen are also essential for everyone in the family.