This simple kids’ science experiment is a must-try this fall! Just grab a handful of Reese’s Pieces and a cup of hot water and you’re ready to make a jaw dropping magic pumpkin. Kids will beg to repeat the experiment over and over again.

Try it out and then hop over to grab 30 more easy-to-follow science experiments (plus a no prep science journal to keep track of their results!) in our shop!

Magic Pumpkin Science

Getting Ready

Prepping the activity couldn’t have been any easier!

I grabbed the bag of Reese’s Pieces I picked up at the store the day before and filled a measuring cup with hot tap water. Then I asked my kids to grab a white plate and join me.

That’s it! We were ready to jump in and get started.

Making Our Magic Pumpkin

The kids helped me arrange our Reese’s Pieces in the shape of a pumpkin on our plate.

We placed the orange candies in a circle to form the sides and used four brown candies to make the stem at the top.

playdough-to-plato-21 | Magic Pumpkin Science

Then we slowly poured some hot water on the outside edge of the pumpkin. We needed just enough to cover the bottom of the plate.

playdough-to-plato-22 | Magic Pumpkin Science

That’s when the REAL fun began! We sat back and watched the water work its magic.

The kids couldn’t wait to grab a fresh plate and try the experiment again!

The Science Behind It

The shell of the Reese Pieces are made with food coloring and sugar.

When the candies come in contact with the hot water, that sugar dissolves into the water and the colors spread across the plate, filling the pumpkin.

The activity is such a simple way to introduce states of matter to kids.


More Jaw-Dropping Science

Continue the fun with our mega pack of 30 must-try science experiments for kids! All of the activities use common household supplies like salt and baking soda. You won’t believe how easy they are to prep!

Similar Posts


  1. I can’t wait to try this with my kids. They will love it!

  2. I can imagine PJ trying his hand at this…how will we manage the wait? Oh, the suspense:) I’m already excited for him to try this myself:)

  3. How long does it take for the “magic” to happen once you pour the hot water on the plate?

    1. Great question Georgeann! The “magic” starts within the first 10 seconds and the whole pumpkin fills with color within 2-3 minutes. 🙂

  4. Can you use skittles for this because of peanut allergies?

    1. Yes, it will just change the colors 🙂
      Have a blast with your class!
      Kimberleigh // Community Manager Playdough to Plato

  5. We’ve done the rainbow Skittles experiment like this…but we’ve never tried it with Reese’s Pieces. I love the idea of creating a pumpkin!

    1. Aw, thank you, Stacey! It is SO much fun- I hope you and yours have a wonderful time!
      Stay inspired!
      Kimberleigh // Happiness Ambassador

  6. Does this work with M&Ms? We can’t have nuts at our school.

    1. Yep! This would work just as well with M&Ms!
      Thanks for asking!
      Ashley // Happiness Ambassador

Leave a Reply

Your email address will not be published. Required fields are marked *