If I Had A Hammer by Peter, Paul & Mary is in Ab at 110 beats per minute and runs 2:45 across 40 bars. It uses 9 chords — Eb, Ab, Bb7, Fm7, Ab7, Bb9, Eb7, Cm7, and a few more. The chord diagram changes as the song plays and the words light up as they are sung, so you can strum and sing along without reading ahead.
Want the melody line note by note? If I Had A Hammer guitar melody tab.