UGears STEM LAB Curvimeter
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UGears STEM LAB Curvimeter



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UGears STEM LAB Curvimeter

When you measure the length of a straight surface, you use a ruler or a tape measurer. These tools aren’t as useful when you need to measure the length of a curve; instead, you need a curvimeter, which is even more exact than a compass. To learn about this invention and build a model you’ll be proud to display, purchase the UGears STEM LAB Curvimeter. This item looks like a clock, except that its face displays distances in centimeters, inches, meters, and feet rather than times.

To use the device, you roll the wheel across the item that needs measuring. As the wheel moves, the measuring hand moves as well, tracking how far the wheel has traveled. If your distance is greater than one rotation, the device also tracks how many circuits it has completed. Once you’ve measured the entire item, multiply the number displayed on the face by the number of rotations to find the total distance.

Although curvimeters are still used today, they are not new. Their origins are a mystery, and many different nations claim that someone from their area invented the device. For example, some people believe that Virtuvius the Roman invented the curvimeter around 23 BCE, but others think it was Zhang Heng, a Chinese intellectual. While the history of this tool is disputed, in 1873, Edward Russell Morris secured the patent for it.

Not only is the UGears STEM LAB Curvimeter a working opsiometer, but it is also one that you can easily assemble yourself. You don’t have to worry about getting glue everywhere, and you don’t need any special equipment. The parts are precut, although you may need a knife to loosen a few from their boards, and if you don’t remove them carefully, use sandpaper to smooth down the edges. Additionally, when the gears stick or don’t fit, a little candle wax on their edges takes care of the problem.

As you assemble the curvimeter, be careful not to bend or break any of the more than 100 wooden parts, but if you do have an accident, use UGears’ website to request a free replacement. You also have the choice of painting the model, although this step will add a few days to the project. Avoid acrylic paints, since they tend to be so thick that it’s hard for the gears to move. Watercolors are a good option as long as you let them dry completely before continuing with assembly.

When you want a craft to occupy your hands while also stimulating your mind, turn to the UGears STEM LAB Curvimeter. Whether you’re building on your own or with a friend, you’ll be so excited to use the device that you finish assembly in no time.

UGears STEM LAB Curvimeter Specs

Model Size: 4.5 x 3.3 x 6.6 in
Package size: 8.1 x 7.4 x 2.5 in
Number of parts: 109
Level: Easy
Assembly Time: 2 hours
Recommended Age: 8+
Kit weight: 0.9 lbs

Manufacturer: UGears 


UGears STEM LAB Curvimeter


Teens and adults aged 14 and up will enjoy building their own 3d puzzle set. Creating the wooden puzzle model kit is challenging and may take a few hours, depending on your pace and patience. These building sets will draw out and propel your child’s ability to plan and build their own structure like a true architect or engineer.


The UGears STEM LAB Curvimeter wooden craft kit is not only functional and fun, but it is designed beautifully, too! Great choice as Thanksgiving Day Gift, Birthday Gift, Christmas Gift, Father’s Day Gift, Back to School Gift, Gift for Boys and Girls, for friends and family members. The mechanical wooden puzzle has decorative designs that look captivating in the finished product. Display a truly unique wooden piece on your desk, shelf, or nightstand.


With laser-cut technology, the pre-cut wooden board will be easy to pop the individual pieces out of the sheets. Utilizing safe and environmentally friendly wood from all-natural trees without any added toxins, even children can safely play with sets. Also, the educational toy comes packaged with clear, simple, and very detailed English instruction as well as illustrations. Follow the steps shown in the instructions and you will build the wooden art craft set quickly and correctly.


Thrill the entire family and provide fun and entertainment by piecing UGears STEM LAB Curvimeter DIY wooden puzzle together. Building this 3-D Puzzle Kit can be worthy for the family to complete together. The complexity of this kit will bring families together for hours to create something truly unique to display in their home. Believe us, this is an unforgettable family time, you will be surprised by the child’s hands-on talent. This model is also a perfect idea for a handyman or anyone who enjoys woodworking.

It integrates the beauty of machinery and scientific exploration, which advocates science and technology, creativity, and freedom.


  • Solving 3d puzzles flexes mental muscles and provides benefits for both children and adults
  • Also provides an effective way to develop motor skills,hand-eye coordination, and build a better sense of structures.


  • You will certainly be proud of displaying your creation to all of your friends and family!
  • UGears STEM LAB Curvimeter will be attractive decorations when you put them in the bookcase, display cabinets, etc.


  • Wood is from all-natural trees, even children can safely play with sets without harmful chemicals.
  • Build your own structure like a true architect or engineer with exquisite workmanship.

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Shipping and Delivery

Some products might need glue, wax and/or batteries. These products are forbidden on regular international air shipping, and might not be included in your package. They can be replaced by any glue that works for wood and any wax.
We have three different fulfillment centers in the United States, Spain, and China. After your order is complete, it takes us 1-3 business days to process your order and get it ready for the shipping center.   If there is a lack of inventory from your nearest location, we will ship your order from our main fulfillment center in China, where we stock a large quantity and style of the products. We make the biggest effort to send your items from your nearest location, but expect your product to be shipped from our main fulfillment center in China; expected time to receive your order 2-5 weeks after order processing. Depending on your location and shipping options the shipping time could be more or less. If you have any question about shipping times, please send us an email to [email protected]


Once the order is shipped, please allow 3-7 business days for the tracking number to be fully updated on the post office system. Please note that your order is actually on the way and there is no delay of the package rather than the tracking number status.

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You are allowed to cancel your order every time it wasn’t shipped. Once shipped it cannot be cancelled. If you received your package with broken pieces or pieces were missing we will send you the parts . To be eligible for this, it must be within 5 days of arriving the product to your destination. We make our best efforts to package your item in the best manner so it arrives in perfect condition, we are not responsible if the outer package gets damaged due to the shipping as long as the inner pieces are in good conditions.

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If your order or products fail to arrive and you have evidence that you’ve reached us via the email mentioned above and we did not get back to you or help you with a return or a refund request within 40 business days of your purchase, you may file a dispute or a chargeback with no liability.

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