The kids join Celery in a space race between them, Uncle Zucchini, and Auntie Eggplant and Zerk. The course is all the way around the Asteroid Belt. / Sydney decides that Jet's robot, Jet 2, is lonely. She decides to design and build a robot companion for him, and names it "Sydney 2."

When the kids experience an earthquake in Boxwood Terrace, Celery takes them up into space to study the Earth's plates and fault lines from above. / Jet's overactive cousin Zerk comes to Earth for a visit, and the kids show him around the neighborhood.

When the kids experience an earthquake in Boxwood Terrace, Celery takes them up into space to study the Earth's plates and fault lines from above. / Jet's overactive cousin Zerk comes to Earth for a visit, and the kids show him around the neighborhood.

Jet is fascinated by the effects of wind on his saucer. He and the kids study how wind works, ending with Sean going on a wild saucer ride. / Jet is fascinated by Earthie golf, and Sean and Sydney try to teach him the rules. When the DSA builds a new mini-golf course, the kids team up against the grownups, and Jet gets to apply his new knowledge of force.

Celery has souped-up the family saucer, adding new features for the kids to use, including a robot arm. They test drive it with a trip to the Moon. / Jet takes care of Mitchell's dog Cody for the weekend, and attempts to teach him some new tricks.

Celery has souped-up the family saucer, adding new features for the kids to use, including a robot arm. They test drive it with a trip to the Moon. / Jet takes care of Mitchell's dog Cody for the weekend, and attempts to teach him some new tricks.

Jet takes the kids on a saucer tour all around the Earth to discover all the ways that water can be found. They visit Antarctica to look at the ice, and then compare that extreme to the icy surface of Jupiter's moon Europa. / Sydney wants to enter a Commander Cressida story contest, but can't think up a good enough story. The other kids help, and they come up with a story about lassoing a comet to bring water to Venus, and then Mars.

Mindy is impatient for winter, because she wants to ice skate. So Jet, Sean, Sydney, and Celery fly to Saturn's icy rings to gather ice from them and return to build a Saturn-ringed skating rink around Jet's house.Jet, Sydney, Sean, Mindy, and Sunspot decide to make a scaled replica of the solar system using found items in their own neighborhood and in doing so learn that an Astronomical Unit is the distance from the Earth to the Sun.

Mindy is impatient for winter, because she wants to ice skate. So Jet, Sean, Sydney, and Celery fly to Saturn's icy rings to gather ice from them and return to build a Saturn-ringed skating rink around Jet's house.Jet, Sydney, Sean, Mindy, and Sunspot decide to make a scaled replica of the solar system using found items in their own neighborhood and in doing so learn that an Astronomical Unit is the distance from the Earth to the Sun.

Jet is amazed to find out that the entire Earth doesn't have the same season at the same time. So he flies with Sydney and Sean from the northern hemisphere to the southern hemisphere to compare and experience holidays in winter and summer...all in one day!Mindy feels bad that she's the smallest kid in the group, so sympathetic Jet and friends use a shrink-ray and become her size. The plan goes awry, and Jet, Sean, Sydney, and Sunspot become the size of mice. Mindy has to follow intricate diagrams to reverse the shrink-ray!