I made these Valentine's Day theme papercuts for my daughters - the red one is for Olivia and the pink one is for Sophia.
There's a free pattern (see below) that I printed onto white copy paper and cut it out. Then, I traced around the openings onto another sheet of white copy paper and cut it out using a sharp scissors.
Glued translucent paper onto the back (red on one heart and pink on the other) - the same kind that I use for my window stars. Tissue paper also could be used.
Here's the link to the free pattern: PATTERN.