Freddy really wants the fossilized Megalodon tooth, but doesn't have the money to buy this rare treasure. Freddy has to come up with a way to find the cash within a week before the shop owner sells it to someone else. 
 After trying to separately asking his om and dad (unwise as parents often speak to each other) he earns his money the hard and honest way and is able to purchase his tooth. 
 I liked the Freddy had to work hard and earn his money. In my opinion, it's never too early to teach others the importance of hard work. Not everything will be given to you and it is important to be resourceful, creative and find ways to reach your goals. 
 Also, when Freddy temporarily loses his tooth he learns to take care of his belongings. He was lucky that his classmate admitted to taking the tooth.