The cardboard-as-furniture and playhouse trend seems to be enduring, and for good reason. It's recyclable (and often recycled), lightweight, inexpensive, durable and can be flatpacked for easy storage in a small space. The Billy Rocker is the latest addition to cardboard goods and the first ride-on toy we've seen. The Billy Rocker is easily assembled and can be decorated to create different animals - a rocking dragon, anyone? It's meant for toddlers aged 36 months up to about 7 years (depending on the size of the child). Read more about it here.