For Christmas, I would like to get my sister's family a fun weekend. They have 2 boys, ages 4 and 6. They live in Breckenridge. They are always looking for some fun things to do on snowy weekends that maybe don't always involve skiing. I am thinking a fun weekend in Denver. I would like to get them gift certificates to different activities, dinner or a hotel. I was hoping to find a hotel with a fun water park similar to Great Wolf Lodge but it looks like they don't exist anywhere in Colorado. So, then I thought maybe a day at the Children's Museum, a fun dinner and a decent hotel that would be fun for her, her husband and the 2 boys. Any ideas would be appreciated.