For the unicorn box: To make the unicorn's horn, take a square piece of paper and roll it into a cone. Glue the cone together with hot glue so it dries quickly.
Using the straight edge and a pencil, mark out a thin rectangular slot on the box for valentine envelopes and cards. Cut out the slot using your Exacto knife.
Turn the box lid over once the slot is cut out and wrap it using the wrapping paper. I am using white for the unicorn, but you can use any color you choose.
Use the Exacto knife to cut the extra wrapping paper from the slot so the slot remains open. Fold the excess wrapping paper under the slot and make sure everything is smooth.