Adventure under the sea with the Diy 3D Book Nook Kit Mermaid Story 77pcs. Much like the mermaid's adventurous spirit, this kit features motion-sensing technology, adding a touch of magic to your space, and fits perfectly on your book shelf or desk as decor! With 77 pieces of pre-cut plywood, this puzzle comes with all necessary pieces and instructions for building. The puzzle will require 3 Aa batteries which are Not included. Bring home some fairytale magic with this Book Nook today!