DIY Jellyfish Races: The Ultimate Ocean-Themed Birthday Party Game for Kids

Looking for a splashy, kid-approved game for your child’s summer birthday party? DIY Jellyfish Races is a fun, water-based activity that kids go wild for!

Perfect for ocean-themed parties, summer playdates, or classroom activities, this game combines active play with a sprinkle of marine science. It’s been a hit at birthday parties, coastal science centers, children’s museums, marine labs, and even a festival for kids with autism.

Ready to make waves? Here’s how to play!

Why Kids Love Jellyfish Races

Jellyfish Races is like a carnival game with an ocean twist: kids use squirt guns or spray bottles to “rescue” stranded (fake) jellyfish by guiding them from a “beach” to an “open ocean” finish line. No touching allowed — those jellyfish might “sting”!

It’s easy to set up, endlessly replayable, and perfect for cooling off on hot summer days. Plus, kids learn fun facts about jellyfish, making it both entertaining and educational.

Pro Tip: This game shines at birthday parties with kids cheering each other on! It’s also inclusive, engaging kids of all ages and abilities, as seen at an autism festival where it was a huge hit.

What you’ll need:

Here’s your supply list to create this ocean adventure (adult prep required):

• 3 long under-bed storage bins (e.g. Sterilite 41-quart, ~35″ long)
• Squirt guns or spray bottles (1-2 per bin, set to stream mode)
• Fake jellyfish (try aquarium decorations or DIY with a Ziplock bag, dryer sheet, and rubber band–see below)
• Metallic crinkle (party aisle at craft stores like Michaels)
• Clear packing tape
• Textured spray paint (sand color, optional for “beach lids”)
• Hand saw or Dremel tool and sandpaper (optional, for cutting bin lids)
• Water source (hose or buckets)
• Table (to hold bins)
• Optional: neon blue food coloring, submersible LED lights (for nighttime play)

DIY Jellyfish Option: Inflate a Ziplock bag (use a coffee stirrer), tape corners, add cut dryer sheet “tentacles,” and secure with a rubber band. It’s budget friendly and works great!

How to Set Up Jellyfish Races:

1. Create the “Beach” (optional):
   • Cut bin lids to ~4″ deep using a hand saw or Dremel (smooth edges with sandpaper)
   • Paint lids with textured sand-colored spray paint for a beachy look
   • Skip this step for a simpler setup: place jellyfish directly in water.
     
     

     

      

2. Make the “Open Ocean” finish line:

• •  Sandwich metallic crinkle between two pieces of clear packing tape (as wide as the bin).

  • Attach to one end of each bin with more tape for a sparkly finish line.

    

    

     

3. Set Up the Bins:

• • Place the bins on a table, and fill halfway with water (add a few drops of neon blue food coloring for flair).
  • Fill squirt guns or spray bottles with water, ensuring nozzles are set to a strong stream.
  • Place a fake jellyfish on the “beach” lid (or in water near the edge), tentacles dangling for each movement.
• Nighttime Twist: Add submersible LED lights to bins for a glowing effect, perfect for evening parties!

How to Play:

1. Line Up: Have kids form a line behind each bin (one player per bin per round).
2. Start the Race: Place jellyfish near the bin’s edge (give it a nudge if needed). Say “3, 2, 1, GO!”
3. Race to the Ocean: Kids use squirt guns or spray bottles to squirt their jellyfish, guiding it from the “beach” to the “open ocean” finish line.
4. Pass & Replay: After each round, players pass the squirt gun or spray bottle to the next kid in line. Kids will want to play again and again!
5. Add Fun: Cheer loudly, have winners race each other, or ask kids to share a jellyfish fact (see free printable below).

Tip: For younger kids or those with motor challenges, start the jellyfish closer to the water for easier play.

Free Jellyfish Fact Sheet

Sneak in some learning with our Printable Jellyfish Fact Sheet! At events, we’ve paired this with a sensory board showing a tentacle model (made with vinyl tubes and zip-ties) and gel ice packs to mimic a jellyfish’s texture. Fun fact: Sea turtles love eating jellyfish!

Download the fact sheet to share at your party or classroom!

Dive Deeper with a Jellyfish Adventure!

Love the jellyfish fun in DIY Jellyfish Races? Take kids on a virtual paddle through Lagoons High Tide, my Sea School course where we encounter jellyfish up close (virtually!) and create a stunning 3D jellyfish craft from recycled materials. Perfect for kids ages 4-14, this adventure blends marine science with hands-on creativity, featuring 8 sea creatures like manatees and turtles.

Join my free email list for 20% off this course and weekly ocean inspo. Sign up now!

Why It’s Perfect for Birthday Parties

Jellyfish Races is a standout for summer or ocean-themed birthday parties because:

• It’s Active: Keeps kids moving and laughing
• It’s Inclusive: Adaptable for all ages and abilities
• It’s Educational: Kids learn about marine life while playing
• It’s Reusable: Use it for playdates, classroom activities, or science events

This game has been loved at coastal science centers, marine labs, children’s museums, and festivals, and is a proven crowd-pleaser!

Try It at Your Next Party!

Ready to bring Jellyfish Races to your child’s birthday party or summer event? Grab your supplies, download the free fact sheet, and let the fun begin!

Want more ocean-themed games and activities? Join my Virtual Sea School for crafts, games, and marine adventures for kids ages 4-14.

Sign up for my free weekly emails and get 20% off Sea School courses packed with ocean fun: Join now!

Live with porpoise,

Eve Taylor, M.Ed.

Ocean Educator & Creator of Living Porpoisefully

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