Science and Slime Birthday Party for Kids

How to Throw a Science and Slime Birthday Party for Kids

As a mom of four girls, I’ve found that science-themed activities are always a huge hit in our house. My daughters love science and making slime, so combining the two for a birthday party was a no-brainer. If your kids are anything like mine, they’ll have a blast experimenting and getting messy with these fun slime party ideas. From creating their own slime to engaging in cool science experiments, this guide will help you throw the perfect slime birthday party for your child’s special day.

DIY Science Party Invitations

Kick off your slime party with science-themed invitations. Use images of test tubes, beakers, and, of course, slime! Include all the important details about the party date and activities planned. Encourage parents to dress their kids in clothes suitable for messy play, as slime parties can get a bit gooey.

Slime Birthday Party Decorations

Transform your living room into a magical science lab with the right decorations:

  • Color Scheme: Bright, bold colors like neon green, electric blue, and vibrant yellow will set the mood.
  • Lab Decor: Set up the party space with periodic table posters, test tube racks, and science-themed banners to create an authentic lab atmosphere.
  • Table Settings: Use science-themed paper goods, such as plates and napkins with beaker and flask designs. Cover the activity tables with disposable tablecloths for easy clean up.
  • Safety Gear: Provide each child with a pair of safety glasses and a name badge upon arrival. This not only adds to the theme but also ensures safety during experiments.

Slime Station

Set up a slime station where kids can make their own slime. Here’s an easy tried and tested slime recipe to get started:


  • 1 cup of white school glue
  • 1 tablespoon of baking soda
  • 2-3 tablespoons of saline solution (lens solution)
  • optional food coloring and glitter.

Instructions: Mix the glue and baking soda in a bowl. Add food coloring and glitter if desired. Gradually add the saline solution while stirring until the slime begins to form and pull away from the bowl. Knead the slime until it reaches the desired consistency.

Slime Variations

Offer different types of slime at the slime bar to keep things interesting:

  • Fluffy Slime: Add shaving cream to the basic recipe for a fluffy, cloud-like texture.
  • Glitter Slime: Mix in glitter for some sparkly fun.
  • Glow in the Dark Slime: Use glow-in-the-dark powder or paint to create a glowing effect.
  • Edible Slime: For younger kids, make edible slime using safe ingredients like lime curd or gummy worms.
  • Unicorn Slime: Mix different colors and add foam beads for a magical unicorn effect.

Science Experiments for Kids

Science experiments are the heart of any science and slime party, providing hands-on learning and endless fun. My daughters absolutely love these activities, as they get to explore, discover, and witness the magic of science firsthand.

Whether you’re creating a bubbling volcano or making fog with dry ice, these experiments are sure to captivate kids of all ages. Here are some tried and tested science experiments that will make your child’s special day both educational and entertaining.

Pour & Fizzel Station

Materials: Baking soda, vinegar, small plastic bottles, food coloring, glitter, large bin or tray and eye droppers.

Instructions: Place the bottles in a tray/bin. Fill the bottles halfway with baking soda, add a few drops of food coloring and/or glitter. Using the eye droppers, kids can add vinegar to the baking soda and watch it react and overflow. The reaction is a great way to show kids how acids and bases interact.

Dry Ice and Warm Water

Materials: Dry ice, warm water, a large container.

Instructions: Carefully place a chunk of dry ice into the container and add warm water. Watch as fog forms and spills over the edges, creating a dramatic effect. Always handle dry ice with gloves and supervise children closely.

Rainbow in a Jar

Materials: Honey, dish soap, water, vegetable oil, rubbing alcohol, food coloring.

Instructions: Layer different liquids in a clear jar, starting with honey at the bottom, followed by dish soap, water colored with food coloring, vegetable oil, and finally rubbing alcohol dyed with a different color. The liquids will create a rainbow effect due to their varying densities.

Balloon Blow Up

Materials: Empty water bottles, baking soda, balloon, vinegar

Instructions: Fill the water bottle half way up with vinegar. Fill the balloon half way up with baking soda. Pull the balloon around the edge of the water bottle. Flip the balloon up allowing the baking soda to drop into the vinegar. The reaction will cause the balloon to fill up. 

Science Themed Activities

DIY Lab Coats: Provide oversized white t-shirts for kids to decorate and wear as lab coats. Let them use fabric markers, stickers, and patches to personalize their lab gear.

Science Bingo: Create bingo cards with science-related images and terms. Play a game of bingo with small science-themed prizes for the winners.

Science Trivia: Prepare a list of fun science facts and trivia questions to ask the kids throughout the party. This is a great way to keep the educational aspect alive.

Science and Slime Birthday Party Favors

Send the party guests home with amazing science and slime-themed party favors that will keep the fun going long after the party ends:

  • Mini Science Kits: Include items like test tubes, pipettes, and small containers of slime ingredients. These kits allow kids to recreate the fun experiments they did at the party at home.
  • DIY Slime Jars: Provide small jars filled with pre-made slime or the ingredients to make their own slime at home. Include instructions and options like glitter, foam beads, and food coloring for added fun.
  • Safety Glasses and Name Badges: Let the kids take home their safety glasses and personalized name badges as a souvenir of their scientist role at the party.
  • Magnifying Glasses: Include a magnifying glass in each goody bag to encourage kids to continue exploring and discovering the world around them.
Science and Slime Birthday Party for Kids
  • Science-Themed Stickers: Fill the bags with fun stickers featuring images of test tubes, beakers, atoms, and other science-related icons.
  • Notebooks and Pens: Provide mini notebooks and pens for kids to jot down their own science observations and experiment ideas, encouraging their curiosity and creativity.
  • Temporary Tattoos: Include temporary tattoos with science themes, such as microscopes, molecules, and slime designs.
  • Science Trivia Cards: Create a set of science trivia cards that kids can use to quiz each other and share fun facts with their families.
  • Bouncy Balls: Add in some bouncy balls as a fun, playful favor. You can even find ones that look like planets or atoms to keep with the science theme.

These thoughtful and educational party favors will ensure that each guest leaves with a smile and a little piece of the science magic they experienced at the party.

Science and Slime Birthday Party Wrap Up

A science and slime birthday party is a wonderful way to combine fun and learning. From making different types of slime to engaging in exciting science experiments, kids of all ages will have a blast. Plus, with the added fun of party favors and creative activities, this birthday party theme is sure to be a hit. Happy planning, and may your child’s special day be filled with slime and science magic!

Subscribe to Mommy of a Princess for more creative party ideas and tips. Share your own party experiences in the comments below and let’s keep the magic alive for all the little scientists and slime enthusiasts out there!


  • Kayla Peloquin

    A blogger, Social Media Specialist and digital influencer, Kayla is the founder and driving force behind, a blog designed to provide party planning ideas, family travel tips, and fun DIY projects with her Millennial 'Girl Mom' audience. She has partnered with several brands, a few favorites include Walt Disney World, Google, Coca-Cola, Carters and LEGOLAND Florida. This venture perfectly fits her current lifestyle with two young daughters.

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