It is a dark green wooden stand that SpongeBob built. It has 2 sticks that are attached to a wooden sign that reads in red letters, "Bubbles 25¢". There are signs under the Bubblestand that display Lessons 25¢. SpongeBob also offers lessons for beginners for only 25¢.
It was created by SpongeBob, but while doing so Squidward complained about the loud noise, so he did it slowly. As Squidward starting playing clarinet, SpongeBob starting rushing on it and finished it. Then, Patrick came and tried it. He wasn't doing so well, so SpongeBob placed a sign saying "Lessons 25¢." He got a lesson by watching a demonstration from SpongeBob. Squidward was annoyed by the racket, and he came down. He made them feel ashamed and pushed them towards SpongeBob's pineapple. When they were gone, he tried it but they zoomed back.
After many tries, SpongeBob showed him his special technique. Then, Squidward mimicked the technique and blew a bubble, but it was actually amazing. He went in his house proudly, but then the bubble raised his house and popped, causing it to fall. SpongeBob and Patrick rushed into their houses before his house landed, and then the episode ended.