sprocket guard

[Hemi636]

My kids don't always wear boots when they ride, and with the nerf bars on the DRR70, I am worried that their foot might find it's way back in around the sprocket.
I was looking for a chain / front sprocket guard for my kid's DRR70's, but I couldn't find any. Has anybody made one, or found something that fits/works?

[born2ride14]

e-tons have a little plastic cover that goes from the fly wheel area to the back of the frame