There are directions for both of these models in this tutorial.
Here is the PDF. I used 65 lb. cardstock.
Here is the .Studio file
Layout all of the pieces. The Cupid model consists of the small hearts and the Cupid. The two hearts model consists of the small and large hearts. Everything has been cut out so that you can decide which model you want when the pieces are placed on the string to be hung up.
Using the template, place some glue in the white area and attach the heart. Remove the template carefully and repeat for the remaining scallops.
Make the scalloped piece and rectangular piece into a hexagon shape as shown above. Bend the tabs on the hexagons upwards. There are two hexagons. The smaller one is for the bottom of the box. Glue the smaller hexagon to the hexagonal tube. Make sure that the bottom surface is flat all the way around. The larger hexagon is for the top of the box. It is matched with the scalloped top.
When gluing the scalloped top, Make sure that the tabs do not show in the scallops. A ledge is formed at the top of the box for the placement of the cage on top.
Notice the ledge on top of the box.
Bend all the remaining pieces in half except for the cupids.
Glue three cage pieces together. Repeat for the other side.
Glue five small hearts together. Repeat for the other side.
Glue five large hearts together. Repeat for the other side.
Your workspace should look like the above photo when completed.
At this point decide whether you want the Cupid or the two hearts. You can't have both the Cupid and the two hearts because they do not fit.
Using sewing thread, glue half of the small heart onto the string at about 4 inches.
Glue the other half of the small heart to itself. At about 6 inches, glue on the larger heart to the string. Do not touch anything for at least a few minutes. Allow everything to dry sufficiently before proceeding.
Glue the string to the top and bottom of one half of the cage structure. Glue the edges the cage and attach the other half of the cage. Do not cut the string until the glue is thoroughly dry. at least 5 or 10 minutes.
I applied an extra dot of glue at the base of the string. When the glue is dry, slide the cage into the box base and glue down.
Two Hearts Box
Happy Valentine's Day!