Like another project of mine, "Heart of glass" (here), this constitutes an unconventional Valentine's gift, or simply a nice project if you like folding paper.
Technically speaking, it's the first stellation of an icosidodecahedron (info here), but I like to think it's a "paper heart" :)
A 25cm tall (almost 1 foot) paper stellated icosidodecahedron.
Bill of materials
No scissors, no glue, no ruler, no pencil. Just paper, time, and patience.
First, you need to prepare 30 sheets of ratio 1:sqrt(3). Then you need to cut and fold 60 modules out of them. Then you need to assemble the heart.
Let's see these three things step by step.