Bird Song - Elinor's Dad is having trouble sleeping in because of the noisy birds outside his window, so Elinor decides to find out why birds sing, and hopefully get her Dad a little peace and quiet. Ari and Olive join her, and the kids come to realize birds sing to communicate, just like how we talk to communicate. The next morning, Elinor uses a whistle to call the bird away so her dad can finally get some sleep. No Need to Shout - Elinor loses her voice just before she and her friends are supposed to sing their song for the class. She needs to figure out another way to perform, so she and her friends decide to observe nature outside for some ideas. They notice that all sorts of animals use different ways to communicate by using actions instead of words, like a dog wagging its tail vigorously or a baby crying. This gives Elinor the idea that she can act out the actions of the song during their presentation. The show must go on!

When an egg hatches and an unfamiliar bird emerges, Sparks' Crew vows to reunite the young bird with its parents. After some trial and error, they observe similarities and differences between young animals and their parents to find the baby bird's family. Curriculum: Young animals are very much like their parents, but there are differences as well as similarities that can be observed. / When the decorations of a young girl's birthday party are suddenly whisked away, Sparks' Crew wonder if this is the work of InvisiGirl. But once investigating further, they learn that something more natural might be the cause of this mayhem. Curriculum: There is so much to investigate, beyond what can be seen; forces of nature, such as the wind, can push objects.

It could quite possibly be Nature Cat's worst nightmare! Squeeks tells her friends a spooky story of a creature that looks like a snake and swims in the river, and nobody knows where it comes from or where it goes. Nature Cat is just glad this is a story and not real, but Squeeks says it is real and shows a picture of the swimming snake. Excited, Squeeks wants to go and look for this creature, and when Daisy and Hal want to join her, Nature Cat knows that his worst nightmare has just come true! / When challenged by Ronald to compete against him for the Neighborhood Rock-Skipping Championship of the World, Nature Cat confidently accepts. How hard can it be to be a good rock skipper? But in preparing for the competition, Nature Cat finds that not only does he have to know how to skip a rock, but some rocks are better than others at being skipped. Looks like Nature Cat is between a rock and a hard place!

When Astronaut Ellen Ochoa comes to visit the DSA and review an engineering project, she runs into the kids, who are running Sean's lemonade stand to raise money for a rocket to Mars. They end up hanging out with her before her DSA meeting. They solve an engineering problem together, which inspires Ellen to use the same solution with the engineering project at the DSA.

The Woodsmith crew turns their attention to making a storage cart that's sure to be a great addition to any kitchen. And you can build it quickly.