The cartoon begins with the Narrator introducing the three bears: Papa Bear, Mama Bear and Junyer Bear. Junyer Bear is reading a Bugs Bunny comic on Papa Bear's newspaper and begins tickling him. Papa Bear manages to punch Junyer and slaps him in the face hard causing Junyer Bear to land on his bowl of oatmeal. Papa Bear then yells him "Eat your oatmeal!" and continues reading his newspaper. Junyer Bear cries with oatmeal on his face remarking "Pop! What I do?! What I do?!". Papa Bear notices something in the newspaper saying, "Wanted Trick bear act, Apply at Mingling Bros. Circus" and tells Mama and Junyer about it telling to need a little practice. Mama Bear tries to protest but Papa Bear yells, "Shut up and let's get going". Junyer is delighted and wants to be a trick bear act and grabs him and makes Henry spin like a beach ball. Mama Bear, who at first was hesitant, joins in singing wearing a sport outfit and Junyer Bear lands Papa bear on Mama Bear's finger still upside down. He tries to punch her but misses, (or possibly stopped himself from doing it) and spins and makes an angry face at Junyer knowing it's really his fault, so Papa kicks him in the butt and he shakes in rage.
Papa Bear and Junyer Bear practice uni-cycling on a string which they tied on two trees. As they start pedaling their unicycles, Junyer's heavy weight makes them fall on the ground and bump into each other. Papa Bear yells him to get off the wire and calls him a size three head which causes Junyer to get off the string sending Papa bear into the air with Junyer chasing telling he be a good bear and won't do bad and Papa Bear lands on their fireplace blackening him and dazedly pedal toward Junyer. Junyer ask him if he's all right. Papa bear tries to punch him but he slips and fells on the floor fainted with a shocked Junyer looking on. They proceed on the next act to swing and grab the next swing. Junyer did not grab Papa Bear and swing for the second time Papa screams "Grab me stupid!" which Junyer to pick him but falls on the ground Papa Bear screams to let go of him, to which Junyer sends him into the branch knocking him out. Papa Bear is ready to make a hit on the white circle gong which is hold by Mama Bear Junyer sees this while eating a cheese and ready to hit only to crash each other. Junyer this time with his head on the board which reads "Hit my Baby son 25 cents for 3 shots", Papa bear throws a baseball at Junyer but it bounces back and hits him, which in turn, knocks him out. Mama Bear carries a couch chair for Papa Bear to land on and Junyer acts to land on the seesaw to send him into the air to land on the couch but he sends him into the sky and to outer space. They return to their house, giving the impression that Henry died after being sent into the air. The next day, they proceed to return to the exact spots they were at the previous day after Henry was launched, with Mama Bear holding the couch waiting for Papa Bear to land on, but he misses the couch and lands on the ground instead.
The next activity is a high diving act. Mama Bear begins playing the drums and Papa Bears dives to the pail of water. However, Junyer steps in eating salt crackers and drinks the pail of water making Papa Bear land on the empty pail. Junyer realizes this what he has done and calls Mama Bear to call for a doctor. Papa Bear proceeds the motorcycle race with Mama Bear holding the finish flag and asks her if she ready and she replies and Papa Bears starts his motorcycle. Mama Bear swings the flag and watches the race. However Junyer is eating a banana and throws the banana peel onto the track, sending Papa Bear to crash his motorcycle injuring him (off screen). Papa Bear wakes up covered in bandages and asks where the newspaper is. Mama Bears hands it to him and protests, only to be silenced when he yells at her to shut up. Henry proceeds to check the address on the circus ad, but finds out that the newspaper was printed on April 16, 1928 and realizes that they are 21 years too late, because the day when he found the ad was on August 1st, 1949. Junyer jumps to Mama Bear in fear. Mama Bear says she tried to tell Henry. Papa Bear gets upset because he figures out that they have been practicing all for nothing. Unable to accept the reality of his blunder, he questions why he has such an abnormal family, escapes his house, and commits suicide by flying off a cliff. However, he lands in a pail of water set by Junyer, who tells him that he done a good thing, resulting in Papa Bear punching him again which sends Junyer crying and remarking "What I do?! What I do?!" and the cartoon ends.
- When this cartoon aired on the former WB channel, the ending where Pa jumps off the cliff (only to be saved by Junyer with the tub of water) was cut.