Oobleck & Leaves: Fall Sensory Activity

Create a fun and messy Fall sensory play activity using oobleck and freshly fallen leaves. It’s super easy sensory activity for toddlers and preschoolers!

Oobleck is a great sensory material that is nontoxic and super easy to make.

It is also addictively fun to play with. My three year old get so excited when I ask her if she wants to do a goop  (that’s what we call oobleck in our house) activity.

She just loves getting her hands dirty!

If you haven’t tried it, you and your little one are in for a treat!

How to Set Up Oobleck & Leaves: Fall Sensory Activity


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Making Oobleck

When I make oobleck, I don’t follow an exact recipe. I generally add the corn starch and then slowly add water stirring it as I go until the consistency is goopy but not watery.

Is it a liquid? Is it a solid?

If your mixture is too watery add a bit more corn starch. If it’s a bit too stiff add a little more water. A good rule of thumb is 2 cornstarch to 1 water.

Using the spoon was fun.

When I said we were going to do a goop and leaf activity my three year old could wait to get started and wanted to help with the mixing. I let her keep the spoon to help play with the oobleck.

I then added some freshly fallen leaves and let her play.

But just using her hands always wins out!

She played with this for quite a while.

Look mummy I covered the leaf in goop!

She covered the leaves in oobleck. Feeling how their texture change as they got covered.

She played with this for so long that I had to add a bit more water to the mixture as it started to get dry.

My hands are getting dry – after 45 minutes of play! I just added more water.

When oobleck dries it converts back into a powder state. So if any gets on the floor it’s best to leave it a while until it dries and then it will be easier to clean up.

Love those little hands at play!

Clean Up

Same goes for disposing the entire mixture in the backing pan when your child done. Letting it dry and then disposing it in compost or garbage is best.