Lesson Zero, Party of one, Canterlot wedding Imo awesome has a great vibe, Return of Harmony, Too Many pinkie pies, Pinkie Pride, Sleepless in ponyville.
Fan created stuff show em the Clint Eastwood parody song with Pinkie., Malk with ponies parody is funny and too freak em out I guess throw in cupcakes too lol.
And last but not least make sure by the end they know RD is awesome.