As the kids get ready for Valentines Day by making their own valentines out of paper, Mindy continues to feel sad that little, frozen Pluto is so far out at the edge of the solar system. When Sydney shows Mindy a newly-downloaded, full-color image of Pluto as seen by the New Horizons spacecraft, Mindy is intrigued by Pluto's "heart" of ice. Mindy once again feels that Pluto deserves our love, since it's no longer considered a planet, but is orbiting out there at the edge of our solar system, like a big frozen Valentine. She asks Sydney to bring her own little hand-made Valentine to Pluto on her behalf. Sydney leads an expedition of the kids to Pluto to bring Mindy's Valentine, experience the frozen dwarf planet themselves, and bring back their report to Mindy. / Sydney is directing the kids in a backyard movie, making her version of a Commander Cressida story about the formation of a star. The other kids all have parts, but Sunspot has the lead - as the star! The kids' movie coincides with the celebration of a star being born near (a.k.a. 10 light years away from) Bortron 7!

Each kid brings their personal project up to the tree house, and each contributes to a huge mess. Now they can't do anything in the tree house because it's too messy, but none of them want to clean up the other's mess. They have to learn to share the responsibility and clean it together.When Mindy tells Jet that clouds are made of cotton candy, and defends this idea because she heard a friend say so, Sean and Sydney set out to show her how to separate fact from fiction through research! Celery takes them up into the clouds to see for themselves.

Each kid brings their personal project up to the tree house, and each contributes to a huge mess. Now they can't do anything in the tree house because it's too messy, but none of them want to clean up the other's mess. They have to learn to share the responsibility and clean it together.When Mindy tells Jet that clouds are made of cotton candy, and defends this idea because she heard a friend say so, Sean and Sydney set out to show her how to separate fact from fiction through research! Celery takes them up into the clouds to see for themselves.

"Sunday Drive" Parts 1 & 2 - After the Propulsions download their new version of their saucer dashboard operating system, things are out of whack. Their test drive to Mars - usually a simple trip - is complicated by the new dashboard. They zip to Venus and Saturn instead... and then finally land on Mars, so they think. They're actually in an Earth desert, Mars-like at first (hot, red soil, lack of water), but soon they realize where they are. A desert vs. Mars comparison is made. Before heading home, the family decides that the old, dependable saucer operating system works just fine for them. Curriculum: An Earth desert and a Mars desert have some similarities, but are also very different. A comparison is made between the two, including life or lack thereof, temperature, water, and soil.

The kids can't play shadow tag because the Sun keeps going behind clouds. Mindy wants the sun to be out all the time! Face 9000 tells them about a system with not one, but three suns! That sounds like a place where there would be shadows all the time. Celery takes them to visit in the family saucer.Sean becomes an amateur magician called the Great Seanzo, dazzling the other kids with magnet tricks. Jet becomes fascinated by magnets, and they all explore the various things magnets can do, culminating in a magic magnet show for Carrot.

The kids can't play shadow tag because the Sun keeps going behind clouds. Mindy wants the sun to be out all the time! Face 9000 tells them about a system with not one, but three suns! That sounds like a place where there would be shadows all the time. Celery takes them to visit in the family saucer.Sean becomes an amateur magician called the Great Seanzo, dazzling the other kids with magnet tricks. Jet becomes fascinated by magnets, and they all explore the various things magnets can do, culminating in a magic magnet show for Carrot.

Mindy has to go to bed when the Sun goes down, but she's having such a fun day with her friends. She asks Jet and the others to help her keep the Sun from going down. The older kids humor Mindy and try to help "slow down the Sun." All their efforts make Mindy so sleepy that she decides to go home and sleep.Sydney and Jet are having a hard time explaining to Mindy that the Sun doesn't move - the Earth is moving around the Sun, so the Sun seems to move. Then Sean comes over dressed as his science hero Galileo, getting ready to do a school report. Mindy asks "Galileo" to explain why the Sun seems to move, and Sean practices for his report by explaining how the planets move, in character as Galileo!

It's evening at the cul-de-sac, and the kids are looking at two asteroids through Sean's telescope - one is light-colored and one is dark. Meanwhile, Mitchell's dog Cody seems to have run away because he doesn't like the black sweater Mitchell put on him. The kids learn about how, just like asteroids, some things are easier to see in the dark than others, like a white card is easier to see than Cody's black sweater. This amount of brightness is called "albedo."The kids go to their local beach to surf, but notice that the beach looks completely different from the last time they stood there. There's way more sand, and the ocean is far away! They decide to be detectives and study what has happened, and learn that the larger and smaller beach is caused by the tides - the rising and falling of the ocean.

It's evening at the cul-de-sac, and the kids are looking at two asteroids through Sean's telescope - one is light-colored and one is dark. Meanwhile, Mitchell's dog Cody seems to have run away because he doesn't like the black sweater Mitchell put on him. The kids learn about how, just like asteroids, some things are easier to see in the dark than others, like a white card is easier to see than Cody's black sweater. This amount of brightness is called "albedo."The kids go to their local beach to surf, but notice that the beach looks completely different from the last time they stood there. There's way more sand, and the ocean is far away! They decide to be detectives and study what has happened, and learn that the larger and smaller beach is caused by the tides - the rising and falling of the ocean.

While making a cake, Carrot and Mindy find they are one are short one ingredient, so they head to the store. But Carrot accidentally pushes a wrong button on the wagon's newly-updated control panel, and they take off into outer space! Using a diagram, methodical experimentation, and record keeping, Mindy and Carrot figure out how to properly fly the saucer back home, where they finally finish the cake.Mindy has a problem: now that she's been to space with the bigger kids, she realizes how much there is out there to see! How can she decide where to explore next? Sydney asks her mom, Dr. Skelley, who presents them with the very first edition of Commander Cressida comics! In reading the comic book, Mindy comes to appreciate that she, like Commander Cressida, can explore space "one adventure at a time."

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!

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!

Sunspot begins acting strangely, and Jet fears that he is sick. Carrot and Celery examine him, and decide that he's acting strange because of a large sunspot on the Sun. The only way to cure him is to bring him to the Sun, and get him close to the huge sunspot.Mindy wants to have a sleepover outside with her friend Lillian, but it's winter and too cold to sleep outside under the stars. Sean points out that they are under the light of a star all the time - our Sun! Mindy learns that our Sun is a star, just like the tiny ones we see at night.

Each kid brings their personal project up to the tree house, and each contributes to a huge mess. Now they can't do anything in the tree house because it's too messy, but none of them want to clean up the other's mess. They have to learn to share the responsibility and clean it together.When Mindy tells Jet that clouds are made of cotton candy, and defends this idea because she heard a friend say so, Sean and Sydney set out to show her how to separate fact from fiction through research! Celery takes them up into the clouds to see for themselves.

Each kid brings their personal project up to the tree house, and each contributes to a huge mess. Now they can't do anything in the tree house because it's too messy, but none of them want to clean up the other's mess. They have to learn to share the responsibility and clean it together.When Mindy tells Jet that clouds are made of cotton candy, and defends this idea because she heard a friend say so, Sean and Sydney set out to show her how to separate fact from fiction through research! Celery takes them up into the clouds to see for themselves.