Bracers
thingiverse
I noticed that there aren't any bracers like these on Thingiverse, so I made some simple ones using TinkerCad. They're built for a child's wrist - so scale the model to fit yours.
Download Model from thingiverse
With this file you will be able to print Bracers with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Bracers.