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Telescoping Mushroom Fidget, Beamrice Inc.

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When printed, the interlocking sections of this captivating telescoping fidget will never cease to amaze you.

Aktualizacja u źródła: 26 lis 2025

Informacje o modelu

SUMMARY

It’s a little over 18 cm by 18 cm with a depth of 1.5 cm. It looks like a Mario mushroom and has a nested mushroom top that can fall inward without falling apart. You can also play with it down on a surface an wiggle it around. You will never get tired of playing with it. Bigger than most others out there!
Everyone had to find an image online and use it as a reference when drawing it in SolidWorks. With our partner (@GhostCat_3779899) we needed to collaborate and design the sketch, like for example the black outline using the offset entities tool. After making our identical sketches we followed the directions to offset the nested pieces of the sketch that would extrude into the game you see in the pictures. We then extruded and cut the sketch multiple times till the nested structure was finished. After which we designed a face with multiple colors with eyes and then mirrored the bodies over the front plane to fully nest the layers preventing the layers from falling out. Once that was done we exported it as a 3mf file like the one linked here. But we continued in the slicer by assigning colors to the bodies so it was ready to print. We exported the G-code and watched our mushrooms print in place. No supports needed.
Link to partner's report. GhostCat.

Using sketch offsets and drafted extrusions/cuts, can you create a telescoping fidget device with a partner while collaborating on TWO IDENTICAL designs respectively?

a) Use the offset entities tool to offset the shape that starts the nested part by 0.08 cm.
b) Then do the same thing with the new shape created inside but do 0.24 cm.
c) Repeat step a and b but start a with the newest shape made in the middle.
d) Keep doing this till the middle gets too small about 1.75 cm the shortest way across, you should stop or risk losing integrity.

a) Extrude the outer most line by 0.75 cm up and with a draft angle of 34.37 degrees going inward toward the middle.
b) Then cut using the next shape inward with the same draft angle going through the previous extrude, you should end up with a ring.
c) Do a and b till you have nested rings all the way to the middle.

Use the extrude and cut tools to make a personalized outline. For us we used an extrude downward from our nested area into the outline feature and then cut it out so that the nested features were connected to the outline but not disrupted by it.

Create a face by converting entities onto the front of the mushroom and then cutting into it. Then use extrusions back out without combining the shape to create a 3 layer thick (0.072 cm) face and eyes layer with separate bodies.

Use the mirror features tool with the whole part over the front plane the lock in nested features so the fidget will not fall apart.

We had a common issue with offsetting that occurs when the shape is too complex to offset inward and we fixed this issue by using other shapes from further back in the nesting process to not mess with the incompatible geometry in the inner layers. Ours was incompatible because of this arc that disappears as it gets smaller.

When the middle was too small the printer would mess up because of the sharp angles and slopes so we had to increase the size to make it more stable to print.

We also had to increase the nesting draft angle to fix the middle from falling out of the mushroom due to the moon like shape. 32.37 - 34.37. This issue was not in fact solved completely though but it is a lot less worse than before.

We needed the outline to be connected to the nested part because in the beginning the nested part was held in by about 1-2 layers which was obviously not strong at all so before even printing the first one we fixed that with outline step seen above. The white triangles you see on the intersection of the outline and the blue nested area are “air gaps” this shows how important it was to ass the outline step to keep the print from falling apart.

I do want to mention that a change I would like to have made earlier on would have been making the nested features go outward. A lot of these fidgets you see online have a handle in the middle so the telescoping makes a pyramid shaped when you hold it up but with ours it makes a bowl shape so to achieve the same effect of smooth stair stepping I would have made the draft angle go outward to so that the bowl would be smooth when held up instead of a bunch of indents. I would also try and find a better way to meet them because the shape used makes the nested area more easy to take apart which defeats the point of PIP. Overall I do like the way the project turned out though.