Edward Goolnick & Sons Yes & Know Invisible Ink Book and Pen Set - Ages 11 to 111

Invisible Ink Yes & Know 11-111 is filled with hours of "by-yourself enjoyment"! Use the invisible ink pen to reveal the hidden answers on dozens of different topics. This book includes popular Invisible Ink games such as Baseball, Hangman, Bingo, and Fleet. Invisible Ink books are great for car trips and other travel situations! Invisible Ink pen included.