CYOEST STEM Kits: Learning While Playing
Speakers that pair with a phone, radios that find the local station and solar cars that wake up in the sun. Built at your table, by the kids who will use them.
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Most-built kits
Ratings and counts come from builders who finished these kits and scored them afterwards.
4-in-1 Solar Power Kit with Magnetic Screwdriver
Ages 8 to 12 · About 90 minutes total
4.4 (496)
$13.99
The joy of hearing your own build play
Flip the switch on a speaker you wired yourself and the first song sounds different. The CYOEST twin-driver kit pairs over Bluetooth, takes about an hour and asks only for a screwdriver and a steady hand.
Five ideas a builder takes away
Connect the drivers and listen to the coil at work
Magnets make music
Inside every speaker driver, a coil pushes against a magnet hundreds of times a second. Build one and the cone stops being a mystery.
See Speaker KitsSlide the antenna up and scan 88 to 108 MHz
Catch a signal from the air
A radio board scans the FM band and turns invisible waves into sound. Pulling up the antenna by hand makes the idea of a signal feel real.
See FM Radio KitsPoint the panel at the sun and watch the racer go
Sunlight becomes motion
Solar cells turn light straight into electricity. Children see it the moment a panel tilts toward the window and the wheels start to roll.
See Solar & Wind KitsSame motor, different job: car, fan or plane
Small motors, big results
Propellers, wheels and fans all run on the same little motor. Swapping it between builds shows how one part can solve many problems.
See Solar & Wind KitsRebuild a picture square by square
Logic before code
Copying a picture onto a grid, cube by cube, is the same thinking a programmer uses. The pixel-art board makes it a game for five-year-olds.
See Gift Sets & First BuildsFind kits by age
About the CYOEST bench…
Who we are…
CYOEST designs and manufactures educational toys for children from about six to fourteen. Our team cuts the plywood, tests the circuit boards and writes the picture guides that come in every box.
What we believe…
Learning while playing is not a slogan we put on the box and forget. A child who builds a working radio understands more about signals than a page of notes can teach, and remembers it longer.
Our promise to you…
Every kit is checked before it ships, every connector is designed to work without a soldering iron, and every guide is drawn so a young builder can follow it alone. If something is missing, we want to hear about it.
Rated by thousands of builders
These numbers are the real star ratings and rating counts for our kits, collected from families and classrooms who finished the build. 7,450 ratings across the bench so far.
STEM kits that end with something that works
The best STEM kits for kids finish with an object that does something. A CYOEST DIY Bluetooth speaker kit ends with a speaker that plays a child's own playlist; a DIY FM radio kit ends with a radio that finds the local station; a solar car kit ends with a racer that rolls across the patio on sunlight alone. That finished, working result is what turns a craft afternoon into real science learning.
Every kit on our bench is designed for no-solder assembly. Pre-soldered motors, push-fit connectors and laser-cut plywood mean children between about eight and fourteen can build on their own, while younger builders start with the pixel-art board and work up to wires.
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Electronics, solar energy and engineering in one place
Our STEM toys cover three big ideas. Electronics kits explain how a magnet and a coil make sound and how a tuner pulls a signal out of the air. Solar power kits show sunlight turning into motion through racers, fans and propeller planes. Engineering builds such as the remote-control car and the wooden binoculars teach how parts fit and move together.
That mix makes CYOEST kits a popular choice for science fair projects, homeschool lessons, classroom STEM centers and birthday or holiday gifts for boys and girls from eight to thirteen, as well as teens and adults who simply like to build.
Choose by age- No solderingPre-wired motors and push-fit leads
- Picture guidesOne clear drawing for every step
- Checked partsBoards and components tested before boxing
- Real gadgetsSpeakers, radios and cars that actually work
Have questions? Read the build-table FAQ!
Do CYOEST kits need a soldering iron?
No. Motors arrive with their leads already soldered and the speaker and radio kits join with push-fit connectors. A small screwdriver is the only tool most builds need, and several kits include a magnetized one.
What age are the kits for?
The pixel-art board starts at five. Solar and wind kits suit roughly eight to thirteen, the radio kits eight and up, and the Bluetooth speakers are comfortable for ten-year-olds through adults.
Are batteries included?
Batteries are not included. The speaker kits take four AA cells, the radio kits take two, and the solar models run on sunlight with AA cells only for the battery-driven builds.
How long does a build take?
A single solar model takes fifteen to thirty minutes, a radio around forty minutes and a speaker about an hour. Multi-model boxes can fill a weekend.
Can the kits be used in a classroom?
Yes. The eight-model solar boxes and the bundles were put together with group tables in mind, and each model comes packed separately so several children can work at once.
Where do I buy a kit?
Every kit on this site links to its product listing at our partner store, where you can check the current price, delivery options and stock before ordering.