9 Easy Kid Inventions for 3rd Graders [How-To Included]

Have you ever wondered about how to get your kids interested in science? It is not an easy task as children tend to be more interested in video games, cartoons, and other fun activities. But there’s a solution: I’m presenting to you easy kid inventions for 3rd graders.

If you’re a parent that enjoys DIY projects, creating things often with your hands, and finding opportunities to spend time with your children, then you’ll love creating easy kid inventions for 3rd graders.

If you’re looking for a guide to come up with cool ideas for your invention, then this article is for you. I’ll be sharing 9 proven tips you can use today to come up with ideas for inventions.

This is one of the easiest things you can do as a parent to spend time playing games and learning from your children.

Also Read: My Favorite Inventions for 2nd Graders

A list of 9 easy kid inventions for 3rd graders

Inventing is the best thing to do with your kids. It will let them know the importance of creativity.

You can encourage them by sharing some of your inventions and asking them to make one too. 

Little kids love to create things and it will help them in their future life. They can learn how to solve problems, be creative and think out of the box.

Here’s a list of 9 easy kid invention ideas for 3rd graders. These are great projects to do with your kids, and they should be able to complete them with minimal adult supervision.

Pot Markers

The Pot Marker is a simple tool to help you keep track of which pot belongs to which type of vegetable.

It’s made of a small piece of wood and a nail, and it works by simply being hammered into the side of the pot.

This is a great way to mark your vegetable pots. Simply use wooden ice cream sticks as markers.

They’re cheap and easy to find, so you can grab a few extras if you have more than one child or if you want to keep your markers separate for each of them.

Phone Holder

phone holder diy

This phone holder is an easy project for any 3rd grader. All you need is a few wooden sticks, a piece of fabric, and glue.

Use your wooden sticks to create the shape of a phone holder. Make sure you leave room for your phone to fit inside the holder.

Next, cover the holder with fabric so that it’s comfortable for kids to hold.

This step is optional—you can skip it if you don’t have any fabric lying around (or if you want your kid to get used to holding cold metal).

Once you’ve covered your holder with fabric (or not), glue it onto your phone stand and let it dry completely before putting anything inside of it!

Toothbrush with toothpaste dispenser 

This is a simple and easy invention that a 3rd grader can make. It is also very useful. It has two parts: the toothbrush and the toothpaste dispenser.

The toothbrush has bristles on one end and it is attached to a handle at the top of the toothbrush.

The other end of the toothbrush has an opening where you put in your toothpaste. The second part of this invention is the dispenser.

It has two parts: a container that holds the toothpaste and a lid that opens up so you can squeeze out the amount of toothpaste you need onto your brush.

The container fits inside of the lid so there is no mess when using this product!

Magnetic Locker Wallpaper

If you were a 3rd grader, you probably spent a lot of time in your locker. You probably put all kinds of stuff in there: crumpled-up papers, gum wrappers, maybe even some of your mom’s makeup (sorry!)

But what if you could use your locker as an organizing station? With our magnetic locker wallpaper, you can!

You just stick the magnetic tape to your locker and then stick everything on it! It’s like having a bulletin board on the inside of your locker door for organizing notes, homework assignments, and more.

Smart indoor Garden

smart garden indoor
Image source: deloindom.delo.si

The first thing to do is to get a small plant pot and put soil in it. Then, you need to find a place in your house that has good light.

I would recommend putting it close to a window or near a lamp so that the plant can get enough light.

Then, you need to find a place where there will be enough water for your plant. You can use an old cup or anything else to hold water and put it in the pot.

After this, you can add your seeds or plants into the soil and mix them together with your hands or a spoon until they are blended together evenly without any large chunks left behind on top of each other.

Finally, place your Smart indoor Garden somewhere safe where nothing will fall on top of it or knock it over accidentally.

Handwashing Station

The Handwashing Station is a portable, refillable hand washing station with a soap holder.

It’s great for camping trips, visiting grandparents, and any other time you need to make sure everyone has access to clean hands.

This invention is simple, but it can make a big difference in the lives of children who have to wash their hands frequently due to health conditions or allergies.

The Handwashing Station allows them to easily do so without having to carry around a bulky container or cart.

It also makes it easy for caregivers to refill the soap dispenser, so they don’t have to worry about running out of soap or forgetting to buy more.

Helping Hand

Kids at the age of 8 are very curious and they want to know everything. They like to invent something new. They also want to help their parents with some chores.

One of the best things for kids is to invent something that will help them in doing their daily activities.

The Helping Hand is a great invention for kids who love to invent something new.

This invention helps kids in many ways like helping them in carrying heavy books or even helping them in making some easy tasks like brushing teeth or washing hands.

Toilet Heater

The toilet heater is an electronic product placed next to the toilet that heats the toilet seat to keep us from being cold.

This product is easy to make because it uses wires, a battery, and a fan. The wires are connected to the battery and then put into a box with a switch on it.

Then connect the wire from the switch to the fan and another wire from the fan to some sort of electrical source like a lamp or light bulb.

Next, take a piece of cardboard and cut holes in it for your hands so you can hold onto it while sitting down on your toilet seat without getting burned by touching anything hot like metal parts on its surface which might cause burns if touched while sitting down on them while using this invention!


earmuffs invention

Earmuffs are a great way to keep your ears warm in the winter. They’re easy to make, too.

Follow these steps:

  1. Cut out two pieces of cardboard that are about one inch wide and four inches long.
  1. Tape them together so that they form a tube shape around your head with an opening in the front for your face.
  1. Wrap tape around the edge of the opening so it stays shut and doesn’t let any cold air in!


Although there are many creations and inventions that our third graders made, it is important to realize that even though these inventions creations may not be as challenging or complicated as other projects, they are still just as valuable and important.

The conclusion is that these will engage the creative side of your child, while also instilling a deep sense of pride in your child when they learn to do something on their own.

I hope this article was helpful to you and gave you hints about new ideas and inventions for 3rd graders.

Feel free to leave a comment and share your own ideas, I’m looking forward to it.