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Fizzy Dinosaur Eggs

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Dapple with a bit of science at home with the kids with this two part, sensory activity! These Fizzy Dinosaur Eggs are easy to create at home with your toddler and preschooler, using common pantry ingredients!

Fizzy Dinosaur Egg bicarb vinegar experiment

Fizzy Dinosaur Eggs

Chemical reactions are fascinating for both kids and parents alike! This Fizzy Dinosaur Egg experiment involves the reaction between an alkaline product and an acidic product. It is a classic combination of two household products that have been used for generations for all sorts of uses around the home. Today, we are using this reaction to create some entertaining learning because it really is so much fun!

How to set up your Fizzy Dinosaur Eggs

This science experiment is broken down between two sections. There is some freezing time required which I feel only helps build the excitement! While ours are setting, I often hear the creak of our freezer door opening and two sets of curious eyes peering in to see their creations resting in the cold.

Part one of creating your Fizzy Dinosaur Eggs is creating the eggs themselves.

What you need to create your Fizzy Dinosaur Eggs

  • 500g Baking Soda
  • 5 tablespoons water (approximately)
  • Bowl
  • Spoon
  • Tray
  • 4 Small Dinosaur Figurines
  • Food colouring (optional, we used two primary colours so we could watch the colours change)
Fizzy Dinosaur Eggs

Add your baking soda to your bowl. Add a couple of drops of your food colouring, if you’re creating coloured eggs, then your water one spoon at a time, stirring between each one until the baking soda is malleable. It will seem crumbly in the bowl however under pressure, the mixture will come together once the correct amount of water has been added.

Fizzy dinosaur eggs

Place a couple of spoons of the baking soda mixture into the palm of your hand and press it gently to form a foundation to press your dinosaur into. Place the dinosaur on top before adding more of the baking soda mixture to form an egg shape.

Now, this step may be challenging for some younger children. It is a matter of applying enough pressure to form the egg, without using too much that the egg breaks apart. Once formed, place your eggs onto the tray before placing them into the freezer for a couple of hours to set. We left ours overnight – really just to build on the excitement for the next day.

Fizzing dinosaur eggs
Fizzing Dinosaur eggs

Part two of your Fizzy Dinosaur Egg science experiment is all about the chemical reaction and hatching of your dinosaurs!

Learning through play opportunities

Let the real fun begin! Kids love watching this part of the experiment! There are bubbles and hisses and fizzles! Learning through play is so much fun! Hatching their dinosaurs is an experience they will love and there are loads of educational and learning opportunities that can stem from doing so!

  • Cause and effect
  • Fine motor skills
  • Sequencing events
  • Crossing the midline
  • Building vocabulary
  • Turn taking
  • Social skills
Usborne Look Inside Science book

What you need to hatch your Fizzy Dinosaur Eggs

  • Your eggs as made in Part 1
  • Pipette or syringe ( we used one of each)
  • 3 x Bowls
  • White Vinegar
Fizzy dinosaur eggs

We made four eggs, so the girl could have two each to hatch. Each child was given a little bowl for them to place their egg into. Use the third bowl to add your vinegar. Fast tip: only add a small amount of vinegar into the bowl at a time incase the kids drop some baking soda mixture into the bowl, reducing its effectiveness.

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Using your pipette or syringe, draw up some of the vinegar then drip it over the egg!

Instantly your child will be rewarded with a display of bubbles, fizzles and hisses as the acidic vinegar reacts with the alkaline baking soda! With each squirt of vinegar, the baking soda egg will fizzle away and soften before revealing the dinosaur within!

Fizzing dinosaur eggs
Fizzing dinosaur eggs
Fizzing dinosaur eggs

Conversation starters

This science experiment is full of opportunities to build on your child’s vocabulary and comprehension. Remember to start with things they know and use this as a foundation to build on. Questions you could ask include

  • What do you think will happen when we add the water to the baking soda
  • What is the name of this dinosaur
  • Why do you think the eggs fizzle
  • What do you think the dinosaur would have eaten
  • How do you think the baking soda mixture will feel
  • Who do you think might enjoy this science experiment
  • What do you think will happen when the vinegar touches the eggs
  • How long do you think it will take to hatch the eggs
  • When have you heard a sound like this before
Fizzing dinosaur eggs

This science experiment is a hit every time! The big kids seem to enjoy it just as much as the small ones too – perfect for families with toddlers and school age children to do together! Fizzy Dinosaur Eggs really are so easy to make and are great fun. What other type of eggs could you make?

When you give this experiment a go, please feel welcome to share your experience on our Play Inspired Mum Facebook Group! We would love to see what your family create!

Do your kids love science experiments? Why not check out this Rainbow Eruption or these pH experiments

Happy learning!

Dani D x

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