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Cardboard Tube Jellyfish

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Author by on August 14, 2026 Updated on August 14, 2026

Turn an ordinary cardboard roll into this adorable cardboard tube jellyfish! A fun ocean themed kid's craft that's perfect for summer.

With summer here and the Dory movie in theaters, I thought some more beach crafts for kids would be fun. That’s why this cardboard tube jellyfish came to be, isn’t he the cutest?? It’s as easy as recycling a cardboard tube and using a foam ball.

painted cardboard tube jellyfish craft

Cardboard Tube Jellyfish


I’ve always loved the animals of the sea, and jellyfish crafts are just one of the things I’ve made when inspired by ocean life.

There’s something so mysterious about jellyfish, and this cardboard tube jellyfish is a fun way to discuss that with your kids while they are creating. Make it a fun lesson on sea life while they are getting creative!

Cardboard tube jellyfish hanging

Craft supplies you will need


Get full list of supplies and directions in the printable version at the end of this post.

How to make a cardboard tube jellyfish


These step by step photos and instructions are here to help you visualize how to make this project. Please scroll down to simply print out the instructions!

  1. Start off by cutting the Styrofoam ball in half. You can save one of the halves for another project. You only need one of them for this craft. Paint one half of the ball with light blue paint and allow it to dry.painting half of a styrofoam bal with blue paint
  2. Paint the inside of the cardboard tube first. You can use any color for the inside, I chose ivory. When that is dry, paint stripes on the outside of the cardboard tube using all three colors.Turn an ordinary cardboard roll into this adorable cardboard tube jellyfish! A fun ocean themed kid's craft that's perfect for summer.
  3. When everything is dry, turn the foam ball upside down with the flat side facing up. Place the cardboard tube in the center of the flat side and “draw” around the tube with a craft knife. Remove the tube temporarily. Use the craft knife, or even a pencil, to widen the circle you just created. When it’s wide enough, insert the cardboard tube into it, fitting it snugly.Using a craft knife to create an indent in a styrofoam ball so a cardboard tube can sit inside it
  4. Use scissors to cut slits up the length of the tube. Bend the tentacles of the jellyfish by pushing the ends of the tube into your palm. Cut a piece of chenille stem about 4-inches long. Bend it in half to create a loop and twist the open ends together. Insert those twisted ends into the top of the jellyfish’s head to make a hanger. Glue the googly eyes on the front of the half-ball.
    Making a jellyfish out of a cardboard tube and styrofoam ball
green and blue jellyfish made out of a cardboard tube and styrofoam ball

The only thing left to do is hang your adorable cardboard tube jellyfish somewhere that everyone will see it!

More Jellyfish Crafts


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Cardboard Tube Jellyfish

Turn an ordinary cardboard roll into this adorable cardboard tube jellyfish! A fun ocean themed kid's craft that's perfect for summer.

Author: Amanda Formaro

Supplies

  • 3- inch Styrofoam ball
  • Cardboard tube toilet paper roll or half of a paper towel roll
  • Acrylic craft paint: light blue ivory/cream, light green
  • 2 googly eyes
  • Pipe cleaner
  • scissors
  • Paintbrush
  • Craft knife
  • Styrofoam cutter or a sharp knife parents should handle
  • Craft glue

Instructions

  • Start off by cutting the Styrofoam ball in half. You can save one of the halves for another project. You only need one of them for this craft. Paint one half of the ball with light blue paint and allow it to dry.

  • Paint the inside of the cardboard tube first. You can use any color for the inside, I chose ivory. when that is dry, paint stripes on the outside of the cardboard tube using all three colors.

  • When everything is dry, turn the foam ball upside down with the flat side facing up. Place the cardboard tube in the center of the flat side and “draw” around the tube with a craft knife. Remove the tube temporarily. Use the craft knife, or even a pencil, to widen the circle you just created. When it’s wide enough, insert the cardboard tube into it, fitting it snugly.

  • Use scissors to cut slits up the length of the tube. Bend the tentacles of the jellyfish by pushing the ends of the tube into your palm. Cut a piece of chenille stem about 4-inches long. Bend it in half to create a loop and twist the open ends together. Insert those twisted ends into the top of the jellyfish’s head to make a hanger. Glue the googly eyes on the front of the half-ball.

This project originally appeared here on

Amanda Davis is the crafty, entrepreneurial mother of four children. She loves to bake, cook, make kid's crafts and create decorative items for her home. She is a crafting expert and guru in the kitchen and has appeared online and in print publications many times over the years.

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