Earth Day Science Experiments For Toddlers: Ideas of 2023

Katharine Hayhoe
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Earth Day is the perfect time to get your little ones excited about science. With some simple supplies and a few hands-on activities, you can introduce them to the wonders of nature and help foster their love for exploration.

From bubble blowing experiments to exploring the lifecycle of plants, these earth day science experiments for toddlers are sure to be fun and educational!

These activities will not only keep your kids engaged but they’ll also learn valuable lessons in environmental stewardship that they can carry with them as they grow.

Let’s take a look at some easy yet creative earth day science experiments for toddlers that you can do together this April 22nd!

Earth Day Science Experiments For Toddlers

Planting Seeds

The sun is shining, and it’s the perfect day for a science experiment! Little hands are eagerly reaching out to get started.

It doesn’t take much to make a toddler smile when they’re playing in the dirt. Today we are going to explore the world of planting seeds.

We will start by gathering some soil and water, two key ingredients that plants need to grow. We’ll put them together in a container and mix with our little fingers until it feels just right.

Then comes the fun part: adding the seeds! Once those are tucked away, it’s time to give them a drink of water – making sure not to drown them in their new home.

Now let’s sit back and watch as these tiny wonders come alive before our eyes over time. With each sprinkle from our watering can, we’ll be bringing life into existence – what an amazing opportunity for us all!

This Earth Day, experience something truly special with your toddlers as you join forces with nature on this incredible journey of watching growth unfold through scientific exploration!

Exploring The Lifecycle Of Plants

Let’s explore the lifecycle of plants!

First, we’ll look at germination, when a seed starts to grow.

Then, we’ll talk about photosynthesis, when plants use sunlight to make food.

After that, we’ll see how pollination helps plants spread their seeds.

It’ll be fun!

You’ll get to see how plants grow and spread.

Let’s get started!


Let’s explore the lifecycle of plants and have some fun with a simple germination experiment!

To start, gather up some soil, water and seeds. Put the soil in a pot or container – make sure it has drainage holes!

Now add enough water to make the soil damp but not wet. Place your seeds on top of the soil, press them down gently so they are just barely covered by it.

Now watch as those little babies begin to sprout and grow!

To see how good your soil is for growing things, you can do a test to measure its fertility. Add one teaspoon of baking soda and two teaspoons of vinegar into a cup filled with your soil sample.

If it bubbles rapidly, that means there’s plenty of nitrogen in the soil which will help feed your plants. When watering your seedlings, give them enough so that their roots can absorb all of that moisture – don’t let them sit in puddles though!

This helps ensure healthy growth. Plants require special care throughout their entire lifetime – from germination to full maturity – so be sure to use these tips when exploring this amazing process with your toddler!

With patience and practice, soon enough you’ll both be able to enjoy watching nature unfold right before your eyes!


Now that you’ve been exploring the lifecycle of plants and have seen your seedlings sprout, it’s time to move onto another important part of plant growth: photosynthesis.

Photosynthesis is a process where energy from sunlight is used to convert carbon dioxide and water into food for the plant!

By monitoring your plants’ growth, you can identify when this essential process begins.

With an earth day science experiment for toddlers, you can show them what happens during photosynthesis in real-time.

Gather some clear cups or containers and fill them with soil.

Plant a few seeds in each cup, place them near a sunny window, and watch as they grow throughout the day!

As the sun rises higher in the sky, observe how much faster their leaves become greener – that’s because they are using more sunlight to produce more food!

Seeing these amazing transformations helps young children understand why taking care of our planet is so important.

Let’s make sure we continue learning about how nature works together!


Now that we’ve discussed photosynthesis, let’s move onto another important step in the lifecycle of plants: pollination. This is when insects like bees and butterflies help spread pollen from one plant to another, allowing them to produce more food!

With an earth day science experiment for toddlers, you can show them how this process happens right in front of their eyes. Start by watering your plants every few days and then place a shallow dish with some sugar water near the window where your seedlings are growing. Then take turns observing what types of insects visit – they will be attracted to the sweet smell of the sugar water!

Once they arrive, watch as they collect nectar from the flowers and transfer it over to other blossoms. They are helping fertilize plants so that new fruits and vegetables can grow! Exploring nature helps young children appreciate all the amazing things that happen around us everyday. Let’s encourage our little ones to get creative with outdoor activities and discover something new each time they go outside!

Blowing Bubbles

Now that we’ve explored the lifecycle of plants, let’s take a look at something a little more bubbly. We’ll be discovering bubble science and painting with bubbles! It might sound silly, but there are lots of fun experiments to do with soap bubbles.

Let’s start by talking about what makes up a bubble. Bubbles need three things: air, liquid (like water or soap) and surface tension (or stickiness). When you blow on the soapy water, it creates tiny pockets of air that get trapped in the sticky liquid. That’s why when you put your hand through a cluster of bubbles they pop – because the thin layer of water can’t hold onto all those tiny air pockets anymore.

So how can toddlers explore this amazing phenomenon? Bubble painting is one way! All you need is some dish soap, food coloring and paper towels or coffee filters.

Put some drops of food coloring into a shallow bowl filled with 2 parts dish soap and 1 part warm water. Then dip your finger tips in the mixture then place them over your paper towel or coffee filter to create designs! You’ll notice as soon as each color touches another one they mix together creating new colors – just like mixing paint!


Composting is a great way to teach your toddler about building soil and water conservation. It’s fun, educational, and easy!

To get started, here are some simple steps you can take:

  • Gather materials such as leaves, grass clippings, kitchen scraps (fruits and vegetables), coffee grounds, or shredded paper.
  • Place these items in an open compost bin – it doesn’t have to be fancy; a plastic trash can with holes poked into the bottom will do.
  • Add equal parts of brown material like dead leaves and green material like grass clippings for every layer added to the bin.
  • To help keep things balanced add water from time to time but don’t make it too wet. Make sure that all materials are covered so pests cannot access them easily.
  • Monitor the temperature inside your compost pile using a thermometer – when temperatures reach 140 degrees Fahrenheit you know it’s reaching its peak stage of decomposition. This should happen within 2-4 weeks depending on the size of the pile and how often you turn it over.

Once your compost reaches its finished state after 6 months or more (depending on climate) you can use this nutrient rich mix as fertilizer or spread it directly onto soil around plants or trees as mulch – either way toddlers will love getting their hands dirty!

Making Ice Cream

Making ice cream is a fun activity that kids of all ages can enjoy! It’s also a great way to celebrate Earth Day – why not make your own homemade ice cream and use natural, sustainable ingredients?

First, you’ll need some basic items:

  • a bowl
  • an electric mixer or whisk
  • a freezer-safe container with lid
  • the ingredients of your choice

Be sure to pick out something special like organic coconut milk or almond extract for extra flavor.

Then it’s time to start mixing up the base of your ice cream.

  • Pour in the liquid ingredients first
  • Slowly add any dry ingredients while stirring continuously.

When everything is fully combined, transfer into the freezer-safe container and place in the freezer for about 4 hours until frozen solid.

Once done freezing, take out your homemade ice cream and scoop into individual servings.

Dig in and savor every bite as you eat this delicious treat made from scratch!

Let everyone try one if possible and be proud of how much work went into making such a tasty dessert – perfect for celebrating Earth Day!


We know how much toddlers enjoy learning about science, especially when it comes to Earth Day.

Planting seeds, exploring the lifecycle of plants, blowing bubbles and making ice cream are all fun activities that will help them understand the importance of caring for our planet.

Composting is a great way to teach children why recycling is so important – they’ll be amazed at what can come from something like an old banana peel!

Overall, these experiments show kids that taking care of our environment doesn’t have to be dull; there’s always something exciting and mesmerizing around every corner.

As adults we should strive to instill in children a sense of awe and reverence for nature – after all, ‘we don’t inherit the earth from our ancestors; we borrow it from our children.’