The inside looks like a regular toy store. It has rows of shelves with toys in them. The counter with the cash register is located near the entrance. Restrooms are located at the back of the building. It has many robotic toys and puppet toys.
The Toy Barrel is a huge barrel with a plaque on it that reads the store's name in yellow letters. Its entrance was designed to not let anything in, or, in this case, anyone out without unlocking it first.
SpongeBob, Patrick, and other fish go here to buy toys. When SpongeBob and Patrick find out about the toy store not being open yet, they both cry, until a construction crew finishes it.
They enjoy the store so much that they want to stay in past its open hours. So, they devise a plan to hide in the dollhouses and go unnoticed as Frank checks the store for any disallowed customers prior to closing up. They are successful in doing so, but are faced with the issue of the inside turning dark and no source of light available. This leads SpongeBob and Patrick to become scared of the toys and fear that they will come to life.
One of them does, the toy robot in particular. To defend themselves, SpongeBob and Patrick dress up as The A-Team and fight it off using bubbles. They succeed, but Patrick brings it back to life, leading SpongeBob to think that they are doomed again. But suddenly, morning approaches and the store reopens.
As the duo exits, they are shown running out with bubble soap in their eyes. When Patrick discovers that the store is reopen, he runs back in despite what he had witnessed the previous night, leaving the kids surrounding the building in awkwardness.