If it's for kids, I'd round off those corners or add some kind of semi-flexible skirt around the bottom, because that outward 90° jut on the foot shelf by the front wheel looks potentially... painful.
I've used a length of old vinyl hose, split open lengthwise, to cover sharp corners/edges on some of my projects. Really saves tarps from tearing along sharp edges.
pluralmonad|25 days ago