Science Wiz - Sound Build Your Own Edison Style Phonograph ONLY PRODUCT PURCHASED DIRECTLY FROM AMAZON.COM ARE GUARANTEED AUTHENTIC Listen, learn, and explore the vibrations of sound with this innovative kit packed with 20 fun, educational activities Build an Edison style phonograph, and record and play back your own sound recordings Includes project materials and a 48 page book with step by step, 3-D instructions to help kids build an understanding of sound Recommended for ages 8 years and up