Can I buy fenders for 16”-20” kids bikes? After riding these past few days, our bikes are covered in mud splatters and the kids were getting splatters all over the back of them clear up on top of their helmets (not to mention throwing some back at me when I followed). I just now thought of it and won’t have time to do my own research until at least this evening, so I figured I’d ask here to get a jump start on it. Not sure if it matters, but they're walmart special bikes (huffy(?) and quest) Thanx for any help.