Yes, your Barbie Dreamhouse, has an elevator, but it's not motorized like a real, modern elevator. This one, built in 1912, does. Nag on the Lake dug up information about this masterpiece of craftsmanship made by a teenage boy for his sister:
The four-storey dwelling is housed in a repurposed glass-front display cabinet standing over six feet high. It was created in 1912 in Sweden by John Carlsson when he was just 18 as a gift for his sister Eva. It comes complete with detailed Victorian furniture, lights and decorative objects and tiny porcelain people. Attached to the outside is a working elevator made of metal and powered by an electric clock motor.