Say hello to the Mysterious Secrets series.

Untie the wraps around the box to reveal the Monster High doll.

Each baby is ready for a spooky slumber party with 5 accessories, including a pet-friendly one.

Which surprise baby will you reveal? As you unwrap the mummy wraps, look for clues as to which doll is inside the box.

Sweet dreams!

Every baby wears pajamas and has an extremely cool, steady posture.

Surprises include accessories like slippers, beauty products, and an eye patch, as well as a pet friend.

Inquisitive fans can also discover character secrets written somewhere on the box packaging! These mysterious secrets of the characters inspire a variety of Pajama Party-themed stories.

Kids ages 4 and up can play out many fun stories with Cleo De Nile, Draculaura, Frankie Stein, and Clawdeen Wolf by adding all the dolls from the Mysterious Secrets: Night of Discovery series to their collections.