Soothe little ones to sleep with this unique bedtime book! • Simply shine the beam of a light (not included) through the page ''windows'' to cast pictures on the wall as you read with your child. • It's a fun and comforting way to end the day and experience a book together. • PUBLISHER'S NOTE: For best results, use this shadow book with a small, single-bulb light source. A small pen light, other single-LED light, or the light on the back of a smartphone is recommended. Multi-LED flashlights are not recommended. If you have trouble getting a clear image, try moving your light closer to or farther away from the page. • With classic poems like ''Twinkle, Twinkle Little Star'' and ''Hey Diddle, Diddle,'' Nighttime Nursery Rhymes will allow little ones to settle into slumberland.