I buy this for my 7 years old son, I don't know what i'm doing I already download Minecraft for our pc, what is the next step????
This link should help you out: http://forum.learntomod.com/t/new-users-how-to-connect-find-the-badges/157577
If you're still having trouble, though, let me know.
The getting started badges will show you how to use the software, connect to our minecraft server and write and run your first mod: