Magna-Tiles Micro Mags Advent Calendar 34pcsOur 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. 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. Great for Gifting: Makes a great gift for adventure loving kids ages 3+.