My daughter absolutely loves the Crayola Crystal Effects Window Markers. These markers are different than the regular window markers. When used they do not show up very well. After they warm up they crystallize. I can definitely see why they put Olaf on the front of the box for the newer series. Though they really should have put Elsa, she was the one that froze things. Regardless, my daughter loves them. She loves Frozen and loves these markers. During the winter they crystallize slower and during the summer they crystallize quicker. The finished product depends on how the marker is held and how the stroke is applied. I think they are a little easier to use for kiddos when it is a little colder. That way they can color more.
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