The melody of Mary, Did You Know by Clay Aiken runs 183 notes across 22 bars, 2:28 long in Abm at 55 beats per minute. The tab sits low on the neck, mostly under the fourth fret, one note at a time — no chords to barre and no strumming pattern to keep up with. A piano backing track plays the chords and bass underneath, so the line you are learning sounds like the record even at half speed.
Prefer to strum and sing it instead? Mary, Did You Know chords and lyrics.