Cody needs a laptop for school, but also wants it fast enough to play Minecraft. Leo says that the good news is that any laptop will run Minecraft. Leo says that if his parents don't mind, the MacBook Air for $999 is a good option. It's great that Cody has been working over the summer to earn the money to pay for it, too.
Leo also recommends a desktop in a public space for kids. That's the safest place for it. Also, put a block on the network so they can't accidentally stumble upon bad things. OpenDNS is great for filtering out the bad things.