It was Spongebob's 15th anniversary. Timmy and his friends were all getting ready for the party.

"Oh boy. The TV show is now 15 years old", said Chester happily.

"Yay. Our favorite cartoon sponge is 15", said Timmy happily.

A.J. was blowing out some balloons. Tootie was writting the numbers 15 down on a yellow balloon. Trixie was writting some anniversary cards down for Spongebob.

Timmy was decorating a Spongebob cake.

Patrick and Sandy were hanging out posters of Spongebob around his house.

"Wow, Timmy. I'm glad your doing a good job. Helping your friends decorate the house just in time for the sea sponge's 15th annivesary."

"Thanks Wanda", replied Timmy.

"And when Spongebob comes in we all have to give him a SURPRISE", said Patrick.

Meanwhile Spongebob was coming home after an excellent day at the Krusty Krab

"Man, did I have the best time of my life?" he said happliy.

When Spongebob entered his house, it seemed to be dark.

"Wow, that's werid. Must've been a blackout this morning." he said.

But it wasn't. The lights were turned on and all of SpongeBob's friends yelled out...

"SURPRISE! Happy 15th anniversary SpongeBob".

"Aww thank you he said.

The rest of the gang had a good time playing games, dancing, and laughing. Then came the big moment. SpongeBob had a big birthday cake waiting for him.

Spongebob sniffed happliy in tears.

"Is that cake, really for me?" he said happliy.

"Yes it is" said Squidward happily.

"Let's all give Spongebob a happy anniversary song" said Patrick.

"Happy 15th anniversary to you. Happy 15th anniversary to you. Happy 15th anniversary, dear Spongebob SquarePants. Happy 15th anniversary to you"

"Make a wish, and blow out 15 candles", said Timmy.

Spongebob holded his breath and blew out all 15 candles.

The gang cheered happily.

"Cut the cake! Cut the cake!" said Timmy.

They all ran to have some cake.

"This has been the best anniversary party ever" said Timmy.

"I liked the part where we played pin the tail on the fish" said Patrick happliy.

They finished all the cake.

Then it was time to go.

"Well thanks for coming. I'm glad you enjoyed yourseleves." said Spongebob.

"Bye Spongebob" said Timmy as he waved goodbye to him. Timmy's fairies poofed them back to Dimmsdale.

Patrick went back to his rock. Squidward went back to his tiki shaped home.

"Man did I have such a good anniversary." said Spongebob happily.

Gary meowed happliy.

The words wrote "Happy 15 Years to SpongeBob".

The end.