Includes 8 Invitations and 8 Thank-You Postcards (with envelopes)

Get silly with your little one's birthday party invitations by including SpongeBob SquarePants on the design! This charming Nickelodeon card is sure to leave your guests smiling. © 2009 Viacom Inc. All rights reserved.

Turn your child's underwater birthday party into an event to remember with these adorable birthday party invitations inspired by Nickelodeon's "SpongeBob SquarePants." © 2009 Viacom Inc. All rights reserved.

This year, add a little underwater style to your child's birthday plans with this adorable birthday party invitation inspired by Nickelodeon's "SpongeBob SquarePants." © 2009 Viacom Inc. All rights reserved.

Add some underwater charm to your little one's birthday party invitations with this fun and playful design inspired by Nickelodeon's "SpongeBob SquarePants." © 2009 Viacom Inc. All rights reserved.

Invite guests to a fun under the sea party with our Sea Sponge Personalized Invitations. Each of our Sea Sponge Personalized Invitations measures 5" x 7" and comes with an envelope. (Each)

Let your little ones let loose at your upcoming event by sending these fun and festive birthday party invitations inspired by Nickelodeon's "SpongeBob SquarePants" Studio Basics designs feature a coated finish and prices that are easy on your pocketbook. © 2009 Viacom Inc. All rights reserved.

Let your little ones let loose at your upcoming event by sending these fun and festive birthday party invitations inspired by Nickelodeon's "SpongeBob SquarePants" Studio Basics designs feature a coated finish and prices that are easy on your pocketbook. © 2009 Viacom Inc. All rights reserved.

Let your son or daughter take a ride on the wild side with this playful birthday party invitation inspired by Nickelodeon's "SpongeBob SquarePants." Studio Basics designs feature a coated finish and prices that are easy on your pocketbook. © 2009 Viacom Inc. All rights reserved.

Get ready for a bubbly, bouncing and bright birthday extravaganza with these fun photo birthday party invitations inspired by Nickelodeon's "SpongeBob SquarePants." Studio Basics designs feature a coated finish and prices that are easy on your pocketbook. © 2009 Viacom Inc. All rights reserved.