Sharpen some pencils — and your engineering skills — with a pencil sharpener you build yourself! Construct the core, add the battery, and wire your mechanism up. Then learn about the invention of pencils, the evolution of sharpener design, and hidden engineering features that help your sharpener work smarter!

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Eureka

Electric Pencil Sharpener

Pencil Sharpener

I was a bit concerned when I saw the age was for 14+. However, my 9 year old grandson loved making this sharpener with supervision. The instructions are very clear and easy to follow. A great gift for any curious child.

This is hands down the coolest project ever!! 

My grandson loved putting this together and then sharing it with his class at school. He is ten. 

Did not give any challenge to put together 

This is such an awesome and useful kit. But to be honest, the first kit didn’t turn on despite double and triple checking the connections. Kiwi was very quick to provide replacement motor/battery pack/wires (we reused the bulk of the original parts). It worked great the second time around. 

This was a little complicated, very cool and very practical. Perfect for my pre-teen!

The pencil sharpener was great.  I purchased  it for my 3 grandsons, ages 5 twins aged 8, whom are being home schooled by their Mother.  The 3 of them took turns assembling it.  There was something that they could all do together.  They were so proud at their accomplishment.  They are using it in their home school classroom.

Very engaging and well designed model. Worked in first attempt.

Awesome kit. It was easy for my mechanically inclined 11 year old. He absolutely loves that he could make something practical.

The Electric Pencil Sharpener was a great starter project for me and my son. The directions were very clear and it was a great hands on engineering project. 

Sharpen some pencils — and your engineering knowhow — with a pencil sharpener you built yourself!

Electric Pencil Sharpener | KiwiCo

Wire up a pair of headphones and jam to your favorite music! Build the headband, rig up the speaker drivers, and experiment with stereo sound. Explore how speakers and other electroacoustic transducers turn electricity into sound, then learn about the engineering history that made modern headsets possible.

lifestyle

Stereo Headphones

Headphones

The grandkids love this kit. It is something they can build and use!  

This one is great especially if your kids have a tablet. The only thing is the ear pads don’t have a good wear life since they just slip on so maybe some double sided tape to keep them on with constantly taking headphones on and off over time.

Wonderful activity. 12 yr old kiddo LOVED it. We were able to really talk about it and she taught me all about the mechanics and electrical! Great!

Our grandson absolutely loved building his headphones. And it's been a year and he still uses them daily! So it lasts, is well designed, and provides hours of fun plus his feeling of accomplishment: he tells his friends he made them! So proud!


This is easily the favorite kit my 12 year old has done! (Close second is the kinetic speaker) The build was challenging and the quality of the headphones is great. He uses them daily for homeschool lessons and they've held up really well.

My daughter LOVES being able to bring these headphones to school and say she made them. She always surprises her teachers when they actually work!

My daughter followed all the instructions perfectly. She loved the snarked about sacrificing a headphone set for her to create her own!

I was thinking of ending my subscription when my son turned 18, but this kit changed both of our minds! Now I’m ordering another kit for myself! Standard headphones are usually too tight. This is very comfortable, it’s cool looking, and the sound is impressive! 
We may never end our subscription! 
Way to go Kiwi employees!!! ?????Keep it up!!!

My 8yo loved this project. She has used them every day since she made them. My husband helped with the instructions but I think she would have figured it out alone too.

My grandson, who's 10, loved the headphones!

Build the headphone headband, rig up the speaker drivers, and experiment with stereo sound. Explore how speakers and other electroacoustic transducers turn electricity into sound, then learn about the historical technologies that made modern headsets possible.

Stereo Headphones | KiwiCo

Build a pop-action basketball trash can and sink a 3-pointer! Construct the bin, then engineer a lid system with complex linkages that automatically flips open a hoop to shoot for. Learn all about parabolas, the mechanics of basketball, and how linkages work before you practice your aim, shoot, and score!

Trashketball

Great project! One of the easier eureka crates i’ve done but the hinges were a little tricky, other than that, its great!

An adult helped my 8 year old complete this project. She had asked for cooler trash can for her room. She did need help to put some of the smaller pieces together, but for the most part, she was able to make it on her own. She’s since personalized it with some fun stickers. It’s the hit of her room! 

I loved this kit! It was one of the most fun crates I’ve done.

My son asked for a trash can with a basketball hoop and loved this gift. He was able to build it with minimal help (8 years old) and the quality is high enough to use as a functional waste bin. 

Great little trashcan with a fun mechanic. The engineering on the hinge is fascinating.

We liked this, it is a fun and functional product!

Engineer a linkage-powered trashketball game. Explore the history of basketball technology, then harness the power of parabolas to aim, shoot, and score with science!

Trashketball | KiwiCo

Sharpen your science skills with this 3-pack of engineering projects. 
1. Headphones 
Build the headphone headband, rig up the speaker drivers, and experiment with stereo sound. Explore how speakers and other electroacoustic transducers turn electricity into sound, then learn about the historical technologies that made modern headsets possible. 
2. Pencil Sharpener 
Sharpen some pencils — and your engineering knowhow — with a pencil sharpener you built yourself! 
3. Trashketball 
Put the "fun" in functional by engineering a linkage-powered trashketball game. 
All 3 projects delivered together.

Eureka Crate Fun and Functional (3-Pack)

I bought this for my son because he received a eureka crate subscription for Christmas and has loved the projects so far.  He loved all 3 of these too.  It is a great way for him to use his time and he is really proud of himself when he’s done.  I wish there were more options to buy buy I guess he’ll just have to wait for his monthly box for now.

My daughter Brooklyn loves all the kiwi crates. We built 4 in one day on wknd and the rest the next day .In the arcade crate was the claw which was a lot of fun but one of the pieces broke. If is possible could you send out a replacement piece with my next months crate. Thx

My grandson completed the 3 pack in 1 day!! He was so excited!

It was an big hit. Especially the headphones 

My son loves the Eureka Crates! Thank you.

A great collection, I had used KiwiCobin the past for the younger line up and the products seemed of lesser quality and we're pretty boring. This crate was fantastic. I have an 11 year old being an 11 year old who wants to just be on her phone and play roblox, not with this crate she got it herself and put the headphones together without me ever asking her to. She loves the little lockbox for herself and gave the pencil sharpener to her math teacher!

Fun projects that my 16 year old is really enjoying!

Great for my 16 year old

My nieces and nephews loved the crates...they were so proud of "their" creations! Thank you

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Eureka Crate Fun and Functional (3-Pack)

Additional details

Electric Pencil Sharpener

Stereo Headphones

Trashketball