If you've been here a while, you know that at my house we love edible play. Food-based sensory play is our favorite kind — little hands get to squish, sort, and explore, and nobody has to stress about what ends up in a curious mouth. This rainbow marshmallow activity was born in exactly that season: my daughter was just finally rounding the corner on not putting absolutely everything into her mouth, and we wanted a play idea that felt safe, simple, and fun for where she was at.
This one turned into a full foodie adventure: dyeing marshmallows, sorting them, matching them, and — let's be honest — eating them along the way. It was super simple to do, with very few ingredients and almost no prep work, which is exactly the kind of activity a busy mom can actually say yes to on a random afternoon.
What You'll Need
Marshmallows — a few handfuls is plenty
Small sauce dishes, one for each color
Coloring for each dish — we made all of the colors of the rainbow
Paper towels and a baking sheet for drying
Our Goodnight Fox Rainbow Colored Flashcards (optional, but they make the matching game so much more fun)
How to Make Rainbow Marshmallows
1. Set up your colors. Grab some sauce dishes and mix up all of the colors of the rainbow — one dish per color. Small dishes are perfect here because little hands can reach right in.
2. Play a matching game first. Before the dyeing even starts, we pulled out our Goodnight Fox Rainbow Colored Flashcards and practiced matching. Hold up a card, name the color together, and find the sauce dish that matches. It's a sweet little learning moment tucked into the fun — color recognition without it feeling like a lesson.
3. Dunk and mix. This is the part the kids love. Dunk a handful of marshmallows into each color and mix them around in the dish until they've taken on the color. Let your little one decide when each handful looks just right — it's their rainbow.
4. Dry them out. Set the dyed marshmallows out on paper towels on a baking sheet so the colors don't bleed into each other. Give each color its own space and let them dry.
Tips We Learned the Hard Way
Marshmallows are sticky, and I mean STICKY. I didn't realize they'd glue themselves to the paper towels as they dried. We lost a few casualties to the paper towels — consider yourself warned!
Keep the colors separated while drying. The whole point of the paper towels on a baking sheet is so the colors don't bleed into each other. Give each color room to breathe.
Sort, match, and snack along the way. This isn't just a craft — it's a food-based sensory activity. Sort the finished marshmallows by color, match them to the flashcards again, and absolutely eat a few (or more than a few) along the way. That's the edible-play magic.
Very few ingredients. Almost no prep work. A ton of fun. Rainbow marshmallows hit that sweet spot every mom is looking for: an activity that keeps little hands busy, sneaks in some color learning with the flashcards, and ends with a snack. If your little one is still in the everything-goes-in-the-mouth phase — or just coming out of it like mine was — this is a wonderful food-based way to play. Find more rainbow ideas in my rainbow sensory activities roundup: https://www.goodnightfox.com/blog/rainbow
