Magnetic Geometry Toy
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Design shapes, explore crystals, build whatever you can imagine. This simple toy makes exploring geometry fun!
- Ocena
- 5 / 5
- Polubienia
- 13
- Pobrania
- 25
- Wydruki
- 1
- Wyświetlenia
- 227
- Oceny
- 1
Aktualizacja u źródła:
Informacje o modelu
- Źródło
- Printables
- Kategoria
- Other 3D Objects for Learning
- Licencja
- Creative Commons — Attribution — Share Alike
Introduction
This toy is all about geometry. Easily construct polygons, platonic solids, and then build onward to explore new shapes. This toy puts geometry into the palm of your hand.
Parts
The toy is made up of sticks and balls.
You'll need 3 mm diameter cylindrical magnets for the sticks. Each stick has two ends and needs a magnet for each end. I recommend at least two 3mmx3mm magnets on each end, for a total of four per stick. Using more magnets will result in a snappier toy with a better play experience.
12 mm diameter ball bearings are needed for the balls. I found that 1 ball per stick was usually plenty. Other sizes of ball bearing are useable, but I found that larger ball bearings are too heavy and smaller ones become crowded. Warning: you can't use stainless steel ball bearings, they don't stick to magnets.
Use the following table to find how many of each part you need. I recommend making 32 sticks to start with.
# of Sticks | # of 3 mm x 3 mm cylindrical magnets | # of 12 mm Dia. ball bearings |
|---|---|---|
1 | 4 | 1 |
32 | 128 | 32 |
64 | 256 | 64 |
Printing
Prints without supports or brim. Adhesion is a concern because of the small footprint, but I had good results with PETG on the satin build plate.
The model should not be flipped over in the slicer because the bottom hole is slightly oversize to compensate for first layer extrusion variances. If you flip it over, the magnets will be harder to insert.
Assembly
The magnets are held in place with a friction-fit and need to be pressed in. Start the press fit by inserting a magnet 1 mm by hand. The beginning of the hole is slightly oversized to make this easier.
As the press fit tightens, use a hammer to gently tap the rest of the magnets in.
Insert the magnets from each end. In the case of using two magnets per end, insert two magnets then flip the stick over and insert the next two. Magnets should be inserted such that each stick has a north pole and a south pole. Sticks that have the same pole at each end are generally worse to build with.
Tip: if the friction fit is too loose, secure the magnets with super glue.
Use
It's easy to build 2D shapes but 3D takes patience. The ball bearings are heavy, so 3D structures can become delicate. In general, the strongest structures are built around triangles.
Have fun!
Warning
This may be a toy, but it's not safe for households with small children. Children who ingest magnets can die.