Ghost Rockets

The countdown is over.

Now comes the hardest part.

Every child takes one more step back as their little ghost sits quietly on the ground.

Noboby wants to miss it.

They know what's about to happen.

They just don't know exactly when.

Then...

The ghost suddenly blasts high into the air.

Laughter erupts.

Everyone rushes to set up the next launch.

This Halloween ghost rocket experiment transforms a simple science activity into a game of anticipation, surprise, and excitement that children want to play again and again. Every launch brings another countdown, another moment of suspense, and another exciting blastoff.

If you're looking for even more playful ways to celebrate the season, explore our Halloween Activities for Kids collection filled with bubbling reactions, ghostly discoveries, glowing activities, and spooky STEM fun.

If your family loves activities that fizz, fly, erupt, and surprise, be sure to visit our Science Experiments for Kids collection for hundreds of hands-on activities that make learning feel like play.

Supplies

You'll only need a handful of simple materials before your ghost rockets are ready for takeoff.

You'll need:

• Clear film canisters with lids
• Cornstarch
• Warm water
• Black permanent marker
• Alka-Seltzer tablets
• Stir stick or craft stick

You'll also need:

• A flat outdoor surface or easy-to-clean area
• Safety glasses (recommended)
• An adult to help supervise each launch 

How to Make Ghost Rockets

Step 1. Decorate your ghosts

Use a black permanent marker to draw ghost faces on the outside of clear film canisters. Every ghost is given its own silly expression. Some look surprised, others look spooky, and a few always end up making everyone laugh.

Allow the marker to dry completely before moving on.

Step 2. Mix the rocket fuel

Add 1 to 3 spoonfuls of cornstarch to each film canister, then pour in enough warm water to fill the canister about one-third full. Stir until everything is well combined.

Now your little ghost is almost ready for takeoff.

Step 3. Get ready

Break one Alka-Seltzer tablet into two or three small pieces.

Drop the pieces into the canister.

Quickly snap on the lid, turn the canister upside down, place it on the ground, and step back.

Now...

Everyone waits.

Step 4. Watch carefully

For a few exciting seconds...

Nothing happens.

Everyone leans forward.

Eyes stay fixed on the little ghost.

Then...

The ghost suddenly blasts high into the air!

Laughter erupts as everyone rushes over to see whose ghost flew the highest before eagerly getting ready for another launch.

One blastoff is almost never enough.

Why Kids Love Ghost Rockets

The best part isn't knowing what's going to happen.

It's waiting for it to happen.

Children carefully place each little ghost on the ground, take a few steps back, and wait. Every launch feels different. Sometimes the rocket blasts off almost immediately. Other times it waits just long enough for everyone to wonder if this one will be different.

That tiny bit of suspense makes every countdown feel exciting.

One child guesses which ghost will fly the highest while another predicts which one will blast off first.

Before long, everyone is experimenting with new ideas, comparing results, and racing to prepare the next ghost.

That's what makes ghost rockets so memorable. Children aren't simply watching a science experiment. They're laughing together, making predictions, and discovering that sometimes the most exciting part of science is not knowing exactly when the surprise will happen.

Extend the Play

One successful launch almost always leads to another.

Invite children to experiment with different amounts of Alka-Seltzer, water, or cornstarch and see how each change affects the blastoff. Some ghosts soar surprisingly high while others barely hop before falling back to the ground. Every launch becomes another opportunity to make a prediction, test an idea, and discover something new.

Try decorating a whole collection of ghost rockets so each one has its own funny, spooky, or wonderfully silly face before racing them one at a time. Children often begin cheering for their favorites, guessing which ghost will launch first, and inventing their own Halloween countdowns.

Sometimes the biggest excitement isn't the flight.

It's waiting to see which ghost decides to blast off next.

Frequently Asked Questions

Can we reuse the ghost rockets?

Yes! Simply rinse out the film canisters after each launch and they're ready to decorate and launch again.

Why didn't our ghost rocket fly?

Usually the lid wasn't sealed tightly, there wasn't enough Alka-Seltzer, or the ingredients weren't mixed well enough. Small adjustments can make a big difference, and experimenting is part of the fun.

Do we need to do this outside?

An outdoor space is best since the rockets can launch surprisingly high and land in unexpected places. If you're indoors, choose a room with plenty of open space and be sure everyone stands well back before each launch.

Can younger children enjoy this activity?

Absolutely. Younger children love decorating the ghosts, making predictions, and watching each blastoff. An adult should handle the launching and supervise every experiment.

Why do some ghost rockets fly higher than others?

That's part of the fun to discover! Changing the amount of Alka-Seltzer, water, or cornstarch can affect the launch, making this a wonderful activity for children who love experimenting and comparing results.

Waiting for Blastoff

Sometimes the most exciting part of a science experiment isn't the launch.

It's the quiet few seconds before it.

A tiny ghost waits on the ground.

Everyone takes one more step back.

Eyes stay fixed on the little ghost.

Then...

Blastoff!

We hope these ghost rockets inspire your family to laugh, predict, experiment, and discover just how exciting a few seconds of anticipation can be.

Because children don't always remember how high the rocket flew.

They remember waiting together to see when it would finally take off.

Save This Idea for Later

A few simple supplies, a tiny ghost, and one exciting countdown are all it takes to turn an ordinary afternoon into a Halloween science adventure children will want to repeat again and again.

Save this Ghost Rockets activity to Pinterest so it's ready the next time you're looking for an easy Halloween science experiment, a spooky STEM activity, or a hands-on project that's guaranteed to make everyone jump, laugh, and race back for another launch.