You can follow along with me by printing out the template right away!
The template is in the next step.
Step 1: You'll Need:
1. Craft Foam
3. Box Cutter/Xacto Knife
6. Contact Cement (Rubber Cement)
7. Paints (Black and Silver)
Step 2: Cut Out the Shapes
Cut out these shapes out of craft foam and stick both overlapping the bigger piece onto the smaller one by 1/2inch.
Step 3: Now Shape It
To shape it heat using a Heat gun/a Stove. Shape it onto a softdrink can or some object close to the size of your wrist.
Precaution: Do not go too close to the flame if you're using the stove to heat foam. it can result in foam melting and you can also burn yourself. Take adult help if you can't deal with heat.
Step 4: Sealing It.
Seal it with 2 to 3 layers of Modpodge and let it dry overnight before you proceed onto the next step (painting).
I've also added those two circles to resemble nails.
NOTE: You'll have to make 3 more of these. In total two for each wrist.
Step 5: Turning It Into Metal
You can use regular acrylic but i prefer spray paint. Cover it with black, once that dries cover it with a light coat of silver.