Navid and Roya Take a Ferry to the Olden Days [Bedtime Story]

Navid and Roya go with their grandfather on a ride to olden days persia. They meet a unicorn, a tiger robot, and salam, the king of all snakes, who is mean at first but becomes nice after being told to do so by Billy the Boa Constrictor. Imaginative bedtime story with lots of interruptions.