The color reveal mechanism consists of heat-activated inks on the accessories contained behind each door. The accessories start off a muted gray color. To transform them into their vibrant intended hues, kids must complete a “reveal” process after opening each door. Builds anticipation: The color change adds excitement and anticipation about what each day’s accessory might reveal.

Try a different reveal method (hot water, blow dryer, or rubbing). Sometimes heat needs to be applied differently. span itemprop="name">Barbie advent calendar has it all[This review was collected as part of a promotion.] My 4 year old daughter was ecstatic when she saw that she got to play with this toy. It came with a mystery Barbie that you had to put in water to see what she looked like. Then the box had 25 little paper doors that you opened to find an accessory piece that went with the doll. One spot had a mystery pet inside that you had to dunk in water to reveal what it was. The paper doors from the box could also be removed to create a wintery scene, which was fun. The Barbie itself had a winter theme with fashion accessories to match. There were so many fun pieces to these calendar and my daughter had a blast with it