Bought as a birthday present for my 4 year old grand daughter to go with her first pedal bicycle.
She'd had plenty of practice on a balance bike, didn't want to start off with stabilisers, so some protection was essential!
The elbow and knee pads are now well scuffed, but her elbows and knees are undamaged, so the pads obviously work well. The pads fitted well, and there is plenty of allowance in the velcro straps to allow for growth.
The only draw back was with the hand/wrist protectors, which were too stiff and cumbersome for her to operate the brakes on her bike effectively, but that's a minor consideration; they''re probably more use for skateboarding, roller skating and blading. Seeing the scuffs and scratches on the pads after her first ride made the purchase well worthwhile - and she loved their pink colour!