Crystal's daughter has gotten into gaming with Minecraft and she's at the point where she wants to do mods. She doesn't understand it, though. Leo says that some mods run on servers online, while some go on the computer (called Clients). A good option is Gary's Mod. Some of the mods she's interested in probably aren't able to work on her computer, though. Mods also tend to work on PCs. The version of Minecraft on Mac runs on Java. There's also an iPad version, but she wouldn't be able to merge them. The risk with a mod, though, is that it's third party.