No, definitely not. For one thing, they can't ride them anywhere - parents won't let them, and roads and neigbourhoods are just way more congested, distances to things are greater, people drive faster, they drive while talking on the phone, etc. Kids get driven everywhere. When I was a kid, we rode our bikes everywhere we went -- and there was no computer or video game console to keep us glued at home. We were always gone somewhere, and it was almost always outside, and it involved having our bike with us. Our bike was our whole life. I suppose that's why so many of us in our 50's, 60's and more now still ride and have an appreciation for the fine bicycle as humankind's most elegant and enduring mechanical invention.