Opal goes on a treasure hunt through the science museum to find her birthday surprise. As Opal and her friends open each clue, readers will have the chance to guess the answers, which are hidden at the bottom of each page. This title allows children to test their scientific knowledge as Opal gets closer to her birthday surprise. Colorful illustrations and engaging text will encourage readers to join Opal to the very end of her adventure. This 6-Pack includes six copies of this Level J title and a lesson plan that specifically supports guided reading instruction.