Here's Trig, hooking the draft poles of his child-carrying pulka to his harness. His son is behind that nifty windshield. Just like on kiddie seats on bicycles, children easily fall asleep in pulkas, hypnotized by the parent's rhythmical movements and all that fresh air.
Somebody, somewhere, has surely cobbled together some dreary flat-screen centered entertainment options for kids in these situations, but so far the idea has not gained traction. All is not lost.