A very inquisitive Brother Bear is wondering why Spring is taking so long to arrive. With Easter approaching and a new arrival to the Bear family on the way, Brother looks for answers, and Mama teaches him the true meaning of Spring.
It's spring time again in Bear Country when changes abound. After reading about little league season starting up, Papa Bear becomes determined to ensure that Brother joins the league and becomes a champion player, while unintentionally ignoring the natural ability and potential that Sister has for the sport.
Papa Bear makes such a big kite for the kite flying contest that it carries him away and into a hang-gliding contest.
Sister's big, noisy sixth-birthday party is considered, "Too Much Birthday", and her sympathetic parents help her realize the true importance of having a birthday.
Papa Bear tries to help three scouts earn their rescue merit badges, but the only one he can find that needs rescuing is himself.
Sister Bear can run faster, climb higher, and hit a ball farther than the boys, and she gloats over it. So Brother Bear and his friends build a clubhouse for boys only, and when Sister discovers this, she plans a terrible revenge on the boys.
McGreedy Weasel and Raffish Ralph hypnotize Bigpaw Bear into attacking Bear Town. But, Brother and Sister break the spell in a flash. They know you can't make someone do something they really don't want to do!
Papa is ambitious to win a pumpkin carving contest and Brother and Sister are also joining in. Papa is extremely secretive with his own pumpkin and guards it closely. Papa then has nightmares and he chooses to miss out on the contest.
After Papa Bear explains about the rules with strangers, Brother decides to only talk to strangers with radio-controlled airplanes and Sister is suddenly scared of everything, viewing all strangers as ominous. But soon, Moma brins some reassuring common sense to the problem, and resolve the children's disputes.
Papa Bear's favorite blackberry honey disappears, and he starts accusing everyone in town, so the Bear Detectives set out to find the culprit. He soon discovers he was the one who ate all of the honey in his sleep.
At the Bear Country Fair, Too Tall Grizzly begins to taunt Brother Bear, resulting in a fight and is ended in a challenge of strength between Pa Bear and the formidable Two-Ton Grizzly.
Brother and Sister's room is a mess, and Mama Bear's solution is to throw everything unnecessary out, but when Papa Bear comes, he offers a different solution. Brother and Sister Bear learn a proper technique to clean up their rooms efficiently and quickly.
Raffish Ralph gathers up a vicious team of Termites, and uses them to sell termite insurance scam, after destroying other bear's property. And the first Bear who was attacked was Papa Bear, and Brother and Sister Bear pursure in trying to bring Ralph to justice.
Mama Bear decides to take her ill-mannered family in hand and offers them lessons to become polite, but she realizes that she received better luck from children than Papa. Unsuccessful in her method, she devises a Politeness Plan - a chart listing a chore as a penalty for each act of rudeness. The cubs foil the plan by being super polite and actually enjoy it.
McGreedy Weasel and Raffish Ralph hypnotize Bigpaw Bear into attacking Bear Town. But, Brother and Sister break the spell in a flash. They know you can't make someone do something they really don't want to do!
On the loose, Brother and Sister defy Mama Bear's rule of only playing ball outside, by shattering Mama Bear's favorite lamp. Felling guilty, the two lie about it, but soon, with much coaxing and fact checking by Mama and Papa Bear, the cubs learn the importance of telling the truth.
Raffish Ralph is chosen by Arch Weasel to create an ultimate weapon to take down Bear Country. They unleash a field of menacing honey bell flowers that threaten Bear Country's supply of honey, by engulfing all bees.
Brother and Sister get involved in a fight, that lasts all day long, and Mama Bear intervenes, revealing that everyone argues once in a while, even with loved ones.
When Big Paw is arrested for being too big and clumsy, Big Paw receives the chance to save Bear Country from the effects of an earthquake, and he is declared a national treasure.
Sister Bear is feared that she will forget her lines when she is chosen to lead a school play. Despite Brother's teasing, she follows Mama's advice and practises until she's perfect. On the night of the performance, it's Brother who ends up with stage fright and who is rescued by his sympathetic sister.
A new Bear family arrives in a nearby treehouse, and Sister Bear finally finds a new friend who is around her age. Unfortunately, her new friend's tendency toward bossiness and bragging soon dampens their relationship.
Papa Bear and the cubs search the woods for the perfect Christmas tree, but run afoul of the woodland animals who live in the trees they aim to cut down.
According to bear legend, when a bear comes greedy, a gigantic bear named Big Paw will come and eat up the entire town. When the large creature actually appears, the bears find that their ideas about him had been wrong.
Brother Bear gets a valentine from a secret admirer.
