Make a heart stencil out of cardstock or cardboard. (I know you have an Amazon box just waiting to be broken down.)
Figure out how many hearts you will need.
Decide on the colors.
Trace your heart stencil onto the paper and cut your heart.
Invite your child to decorate the heart of Valentine using the eyes and making a mouth.
Encourage your child to write their name.
Put the hearts in a bag and backpack to avoid getting lost.
Notes
Teacher pro tip
One year, my preschooler came out of his class Valentine’s Day party, letting me know his cards were still in his backpack. Why? I asked. He replied because the teacher didn’t tell me to get them!