Curious George, Spy Monkey: Nothing is more fun for George than reading his spy book "Double-Oh Doggy." Unless of course he can become a real Double-Oh Monkey! George goes undercover and follows the Man with the Yellow Hat, trying to solve the mystery of what surprise the Man is going to buy for George. But in order to stay completely hidden George needs proper spy gear like "Double-Oh Doggy. " So using recycled materials from home, George builds his very own periscope. George can now stay hidden from the Man as he trails him around town - but will the ever eager Charkie blow his cover? EDUCATIONAL OBJECTIVE: To learn how mirrors can work as tools. Castle Keep: While George practices his golf swing, Bill shows him how a little leverage can send the ball high in the air - much to the dislike of Jumpy Squirrel in the tree! So when George and the Man with the Yellow Hat visit Uncle Tam in Scotland, George is very happy to be able to practice his swing at the Castle Golf Course. But then a pesky squirrel steals his ball and runs off, and George is sent on a wild chase throughout the castle. Luckily, he remembers the principle of leverage, and he's able to pry open windows, pull book cases, spin wheels to lower a bridge and ultimately accomplish the perfect swing not only to retrieve his ball, but to uncover a special family document that will keep the castle in the family's possession. EDUCATIONAL OBJECTIVE: To show how leverage (the action of a lever pivoting about a point) works.