Developmental: Encourages children to learn through play, exploring cause and effect and other logic principles, while fostering the development of hand-eye coordination and fine motor skills. What’s Included: 34 new holiday-themed MAGNA-TILES, including a Santa and Conductor figure as well as a microChassis What Makes It Unique: Our first ever Advent Calendar features 10 decorated square microMAGS, 3 decorated isosceles triangles and a microChassis that rides on the track inside the back cover of the package. Great for Gifting: Makes a great gift for adventure-loving kids ages 3+.