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> toys that used wheels Toy wheels don’t scale. A solid piece of wood is too fragile, it easily splits into rings. A good wooden wheel is harder than it look

• kwhitefoot 5y ago
  > require good quality saws and a tight fit The Aztecs and other South and Central American societies were capable of fine stonework so I think they at least had the potential to do fine woodwork. Even a poor quality wheel and axle makes a useful wheelbarrow.
• webmaven 5y ago
  > You need planks that are crossed with each other, which require good quality saws and a tight fit. You don't need saws at all. Initial shaping with an adze, and subsequent flattening/fitting of the two pieces with friction and an abrasive like sand would give you closely fitted wood surfaces, though not necessarily all that flat. Note that a somewhat similar technique was used to fit irregular stone blocks together with high precision by the Inca. You could also create a flat wood surface by abrasion against a flat stone surface, but that is more labor intensive to produce.