S1, E21: Jyoti can’t wait to show off her new high tech invention to potential investors: an auto-umbrella that senses rain. But to demonstrate it properly, she needs precipitation, and the skies are clear. So off the class goes aboard the bus to track down some clouds. But who knew there were so many kinds of clouds, and only certain kinds produce rain? By the time they find a ripe and ready rain cloud, a huge storm has brewed – and they’re caught in the middle of it!