It’s A Small World by Sherman Brothers is in Bb at 144 beats per minute and runs 1:09 across 33 bars. It uses 6 chords — F, F7, Bb, C7, Fdim7, Gm. 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? It’s A Small World guitar melody tab.