An easy screw puzzle requires a minimal amount of assembly.
If you want to change the size, you can use the Customizer on [thingiverse](https://www.thingiverse.com/thing:6178377) to change the parameters of the model.

**Assembly**
1. Place the small screw part on top of the bolt (make sure the screw thread is the right way up)
2. turn over the nut and screw it on top of the bolt and small screw part

**Puzzle**
Now your task is to screw the nut back off (without breaking the part).

Unscrewable Screw

A filament spool made using openscad
The .stl files there have an outer radius of 100mm, an inner radius of 25mm and 45cm wide.

**How to Customize it**
Download the openscad model and open it in the openscad editor, unfortunately, I could not find a way to use an online editor because it takes a bit more than 11 seconds to render, which then resulted in a Segmentation fault. In the future, I will try to optimise the model so that it can be rendered online.

**How to print**
It consists of 2 printable parts, the base and the top. The other part is a modifier which is used to create the patterns shown in the images, this is done in the slicer.

If you are using Cura slicer, then load in the modifier as a printable part, and centre it on the Top or Base part. And Click the "Per model settings" (Button below "mirror" on the left sidebar).
Next, select "modifier settings for overlap" and "cutting mesh" for mesh type, see image.
And select the settings shown in the image by pressing the select settings button, the settings I choose here were my preference, but you can select any other infill pattern or density of line count.

If you are another slice, then the loading of the modifier will probably be different, I think that in Prusa slicer you can select the printable part and select add a modifier, but I could be wrong.

Filament Spool [Openscad]

spool_top.stl

Three Dolfin models, Two of which are keychains, and the other one is the parenting dolphin model I made first.
The "Dolphin_keychain_Nametag.stl" is a nametag-like keychain, so you can modify it with a program like 3D builder to put your own text on it.

**How to print**
The nametag can be printed with the flat face (with text) on the build place.
I rotated the dolphin around 15 degrees for the other two models so that the back fin and the noise touch the build plate. And so it requires quite a bit of support.

I printed these models with a bit too coarse print settings when printing it yourself, note that the back fin is quite thin and might need more infill.

Dolphin

Dolphin_keychain.stl

The goal of this puzzle is to make the letter Z. All the pieces should connect nicely and all the pieces have to be used.
The puzzle is moderately difficult.

Z Puzzle

Z_all_parts.3mf

A fox who is taking a nice nap

I initially uploaded this model to cults3d.com, but I thought that the people here might also be interested in it.
I have some more (higher quality) fox models on cults:
[Click here](https://cults3d.com/en/design-collections/sagittarius0/foxes)
(They are all below €1)

Sleeping Fox

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:5725599.

A 5 pieces puzzle where you have to put the 5 pieces together into a Dodecahedron.
This is quite an easy puzzle.

There is now .4 mm clearance, so if you want to print it with a decent printer either scale it down to around 70% or increase the horizontal expansion in the slicer. 

The pieces are already rotated flat and need a minimum amount of support.
I printed it using tree support, only touching the build plate (in Cura slicer)

Sliding Dodecahedron Puzzle Easy

Here are some simple small figures that you can put on a monitor or shelf to add some life.
When you place some of these on a monitor keep in mind that some monitors shake a bit causing them to fall off. To fix this either tape them on or tape a piece of anti-slip to the figure.

The figure that lays on its back has three parts, to make it easier to print.

Most of the figures need support.

Small figures

Small Figures - Sitting-waving figure.stl

A figure that has 8 joints, the joints have an octagonal shape which means that the joints connecting to the main body have to be removed to be turned. Support is necessary.

Figure (with joints)

Movable Figure 1 - MainBody.stl

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4877016.

Sphericons are mostly round so that they will roll, but unlike a ball, it will not roll in a straight line, it will follow the face of the sphericon with makes it, for instance, go straight for some distance and then go a bit to the side and then go straight again.
The 7 and 9 are anti-Sphericons since it is an uneven number, these will roll forward and then backwards again. 

They can be printed in two parts (front and back or left and right) and they can be connected with a core, make sure that you have the right core since there are three cores, one for the square, one for the hexagon and one for number 7 to 10.

Sphericons

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4577876.

I made a treasure chest.

It depends on your printer if you need to print support.


Treasure chest

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4564863.

I made some props for a DnD game, but it can be used for any game.
Can be printed without support.


Barrel and Crates

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4529722.

A gift for Father's day 

Father's day gift

A gift box which, when pulled, can extend quite far. It can be a fun toy but it has thin walls, so it is not that strong.

**Print settings**
Was printed ad 0.2 mm layer height.
Does need support, but the spring should be printed without support, so add a support blocker in the middle of the print (going from the bottom to the top) as shown in the figure.

**Post-Printing**
Go with a knife or a putty knife through the layers of the spring to release the layers that are fused together.


Springy giftbox

A gift box which, when pulled, can extend quite far. It can be a fun toy but it has thin walls, so it is not that strong.

**Print settings**
Was printed ad 0.2 mm layer height.
Does need support, but the spring should be printed without support, so add a support blocker in the middle of the print (going from the bottom to the top) as shown in the figure.

I also have a Thingiverse account:
https://www.thingiverse.com/sagittarius0

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