Before heading out on a trip, pack 1 of these activity books from Melissa & Doug to keep your young traveler engaged and entertained. Each book contains a variety of activities to build skills in a fun way. Helps keep kids entertained while traveling or at home. Fun activities are designed to engage young minds. Bring along the thrill of a spy mission on your next trip. Comes with 3 activity books in a take-along pack. Discover secret messages with the decoder ring. Find hidden clues using the spy glass. Use the secret-message pen to write down cryptic clues.