Complex sentence: Their toys were largely made of wood, with the wood milled and rendered into parts at a facility in Norway, MI and final assembly and finishing taking place at the St. Paul headquarters and factory located at 353 Rosabel Street (now Wall Street).
Split into simpler sentences: Their toys were largely made of wood, with the wood milled and rendered into parts at a facility in Norway, MI. Final assembly and finishing of the toys took place at the St. Paul headquarters and factory located at 353 Rosabel Street (now Wall Street).