Barbara is looking to buy a tablet that can run Powerpoint for her Granddaughter. Leo says that although Barbara wants to get something that runs Powerpoint, he recommends an iPad. Apple has an app called Keynote that will read and write to Powerpoint files.
She could go with the Windows Surface RT instead. Another option would be the Google Nexus 7, but there's no Powerpoint equivalent on Android. The chatroom says QuickOffice will do it, but Leo doesn't think that's an ideal solution for making presentations. That's why the iPad is the best solution.