Easy Spring STEM Activities


With spring just around the corner, I am excited to do some new spring STEM activities at home, and at school with my students!

If you have not done a STEM activity before, STEM stands for, Science Technology Engineering and Technology. STEM activities are a great way to increase children’s experience with each of these strands of science.

By exposing children to STEM activities, you are helping them learn about the world around them and teaching them about these important professions and types of science.

This spring STEM activity is simple to create and will keep children busy, engaged, and learning as they do the experiment.

Materials for Your Spring STEM

Since I work with young kids, and like to do hands-on experiments, I always make sure that the ingredients are safe for kids to use.

As with all science experiments, make sure to supervise children while they are doing the experiment.

spring stem shows a pinterest pin.

The ingredients for this spring STEM are simple and you probably already have them at home. All you need is:

  • Baking Soda
  • White Vinegar
  • Food Colouring
  • Sparkles (Optional)
  • Hidden Treasure (Colourful beads, plastic flowers etc.)
  • Silicone Flower Muffin Mold (If you don’t have one, you can use cupcake liners)

Children love to do science experiments, especially when they ‘explode’. This spring STEM experiment is easy to prepare and will impress kids of all ages!

spring STEM shows a stack of flower shaped baking soda pucks.

Preparing Your Spring STEM

There is a little bit of prep involved in creating the pucks for this spring STEM science experiment. However, it is simple and fairly fast. Even children will love helping prepare the materials.

Start by mixing baking soda with water. You will need roughly 1/2 cup of baking soda for every puck that you want to make.

Add water to the baking soda and stir. The consistency should be like cake mix. You need enough water so that the baking soda is mixed in and all wet and you should be able to stir the mix.

science for kids shows a bowl with baking soda and water mixture.

If you add too much water, don’t worry, it will still work, but it will take longer to dry.

Once the mix is ready, you can add food colouring. I used a variety of spring colours in my baking soda and water mixture so I mixed in the food colouring in several small bowls. One for each colour.

Before adding the mixture to the silicone molds, you can place a small treasure inside of the mold. I used colourful beads and gems.

You can put anything in it that won’t get destroyed by the water and later the vinegar. Small plastic items work best.

spring STEM shows a bowl with a white mixture with green food coloring being stirred by a child.

Make sure whatever you choose to put into the silicone mold is safe for the children you are doing the experiment with.

I found silicone molds shaped like flowers, which was perfect for my spring STEM theme, but you can use whatever you have on hand.

Then, scoop out the baking soda mixture into each flower mold. I topped each mold off with another few colourful beads and some sparkles.

Depending how much water you use to make your pucks, they will take at least overnight to dry. When there is no water on the top and the pucks don’t feel cool to the touch, they should pop out easily from the mold and you are ready for your science experiment.

spring STEM shows a flower silicone tray with colorful flowers in each.

I used this idea for a Shamrock Science experiment and the baking soda pucks are made the same way. A free printable of instructions of measured ingredients are available to subscribers. More information can be found: Exciting Shamrock Science Experiment.

The Spring STEM Experiment

Once the pucks are dry, you are ready to begin!

I started by giving each child a puck. They took a minute to inspect it and predict what they thought was going to happen when the put some vinegar on it.

I gave children magnifying glasses to inspect their spring baking soda puck closer. Children love using magnifying glasses because it makes them feel like real scientists – or so my students always tell me.

Next, I gave everyone a small bowl of vinegar and an eye dropper. We have special eye droppers for science for kids that my students love. (Link below to eye droppers)

Children used the eye droppers to pick up some vinegar. They dropped one drop of vinegar onto the baking soda puck and then watched and listened to what was happening.

The fizzing, or ‘explosion’ as my students called it, is a chemical reaction that occurs when the vinegar touches the baking soda. The two materials react to each other and cause fizzing.

spring STEM shows a yellow flower shaped baking soda puck.

The vinegar breaks away at the baking soda. In doing so, it revels the hidden treasures inside.

You can then add several more drops as the vinegar breaks apart the baking soda. It is very exciting when the fizzy bubbles clear and kids begin to see all of the beads inside.

In more scientific terms, the baking soda is a base and the vinegar is an acid. When an acid and a base are mixed, a chemical reaction occurs. In this case, we can see the reaction with the fizzing.

Encourage children to also listen to the sound the reaction makes.

spring STEM shows a fizzing baking soda puck.

To extend this activity, I like to add food colouring to the vinegar. In this case, I added blue so that when the vinegar is dripped onto the yellow baking soda puck it creates green.

By adding colour to the vinegar, you are adding another sensory experience for children. When the coloured vinegar mixes with the coloured baking soda puck, the colours mix and may create a new colour.

This colour mixing is another simple, and great way to add another element to this spring STEM activity and it teaches a bit of art.

This spring STEM is full of learning experiences and hands-on fun!

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From science and art to outdoor activities and escape rooms.

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