Eureka wants to keep a mammoth as a pet which she struggles to get it in the house. Eureka tries to befriend a new girl by making and giving her more sophisticated things.
Eureka has ideas to help her mom's restaurant, but accidentally unleashes a steam geyser instead. Dipply follows Pepper to school one day, inspiring other pets to do the same.
When Eureka invents a vehicle to help her friends get to school faster, Bog doesn't like the change. Eureka is determined to find a use for 'stinkpods'.
Pepper's boundless strength threatens to ruin Eureka's invention. Eureka and Roxy take a mother-daughter road trip to see the hatching of the flickerwing butterflies.
Eureka tries to rid her father's wheel shop of some pesky pteros birds. When Eureka's friends try to claim a beautiful canyon, she helps by dividing it equally between them all.
It's warm in Rocky Falls and it causes Murphy to "snurf," a hiccup-like habit unique to mammoths. Eureka volunteers to move a mysterious meteorite out of the town before sunset.
Ohm tells his students about a hidden cave with glowing creatures, and Eureka aims to find it. Eureka and friends try to identify the species of an odd animal they come across.
When school cancels due to an animal issue, Eureka aims to make a ride so she and her pals can spend the day. Barry tries to up his drum skills when his idol musician comes to town, and is giving her sticks to whoever drums well on stage.
Eureka and her classmates compete each other in trying to take the fruit from the top of a slippery tree. Eureka and her friends go camping which becomes uneasy for them as they are not used to spending a day away from their families.
When Eureka, who likes trying new stuff, is paired to do a school project with Bog, who is conservative, the two pupils have their cooperation tested. While Eureka, Barry, and Pepper have their snow day fun, Murphy feels left out.
Eureka meets her match when she comes across a garden-invading ferret that can build things like her. For a school project, Eureka is paired to do explicit best friends stuff with Pepper who overdoes it, and Barry gets pretty much lonely.
Pepper struggles in dance class as she has to practice something she is not familiar with. When Eureka installs telephone lines across Rocky Falls, people start calling Barry whenever they need advice.
Murphy gets jealous when Eureka focuses on Dipply more than him. Eureka builds a jam-making machine at her mother's restaurant so she could spend time with her friends.
Eureka has a dinosaur costume which she aims to wear at a festival, but it gets taken by a real dinosaur that thinks it is a mate. Eureka's grandma comes to visit after a long journey, and Eureka wants her to stay.
Barry tries to paint a picture of KB, but KB's jumpy nature makes the task a challenge. Eureka, Barry, and Pepper struggle to retrieve their kites that are stuck in the midst of a swamp.
Ohm's students quickly learn how to surf, except Eureka who goes on to experiment with some modified boards. Eureka and Pepper come up with names for their class pet, thus the rest of the class needs to pick which one the pet should wear.
Barry longs to have a warm beach party for his birthday, but this is impossible since he was born on a winter's day. Eureka receives badminton equipment from her grandmother as a gift.
When her mom goes on an outing with some neighbors, Eureka and her friends try to run the restaurant. Barry takes KB to stay in his home after the bird's tiny house gets blown away by a storm, but he has to deal with KB's rambunctiousness.
Bog's pet, Ump, lays an egg, and his friends teach him how to care for it. Eureka and her buddies come to the restaurant for pizza, but some of them become very demanding on how even a slice should be with the rest.
Eureka invites Bog to perform with her band at Winterfest when she invents a new instrument that only he is able to play. Eureka builds a zipline to take her back and forth to two activities that fall on the same day.
Eureka builds a wheel contraption to help Rollo make several pots at once. Eureka tries to make a super strong glue to put a painting on her wall but can't find the right recipe.
Eureka thinks up a way to bring the moon inside her home so her friends can read at night. Dipply wakes up with a toothache but is scared to see Sierra, Rocky Falls' dentist.
When her sand-sculpture experiment goes wrong, Pepper accidentally invents glass. Inspired by a school assignment, Eureka creates a special walk to the waterfall for Murphy.
Dipply's rash needs to heal before the beach picnic, but all her scratching only makes it worse. Bog loses Clod's stuffed turtle, and launches a cover-up to build a new Quishy.
When Eureka's balloons lift off with Barry's drums, the trio goes in a blimp to get it back. Barry has trouble waking up for school, so Eureka builds him the first alarm clock.
When Eureka's Grandma Wanda sends her a special shell, Eureka builds a music box. Eureka builds identical twins Cypress and Spruce a "wheelasaurus" for their birthday.
When snow threatens to stop Paleo's Soup Night, Eureka invents a snowmover. The kids are fans of Eureka's new invention, the Flower Powerer, but the sound upsets Murphy.
Inspired by Barry's painting and Eureka-made super-gear, Pepper becomes the Mightysaura. To get Paleo ready for Rocky Falls Appreciation Day, Eureka invents Smoppy, a cleaning bot.
A snorasaurus takes a nap in front of the cave, stopping Eureka's cave birthday party before it begins. On a special field trip to the library, Eureka just can't help "thinkering."
