This activity is great for all ages. It can be made simpler for small hands by cutting fewer slits. Weaving a heart with more slits is a much trickier endeavor, so that variation is best for older children or adults.
Materials:
Cut out two pieces of paper in two different colors. Use these instructions for each:
Carefully weave the two halves together, working the strips gradually together.
To finish, staple or tape a small strip to the top to hang it by.