Chaim has a nice collection of old instruments available for rent. The violin sizes rang from 1/16 for 4 year olds to 7/8 for the almost grown ups, they come with a case, bow and shoulder rest.  The Cello's are available in 1/8 to 4/4 size

The renting prices depend on the instrument, but starts from 20,00 per month for a violin and 30,00 per month for cello.