Construction game
Another game for my granddaughter.
The game is suitable for different ages although it is used differently according to age.
...For very young ages it can be used to distinguish shapes and colors. For this reason, I recommend printing the pieces in a different color in the same way. If the boy or girl is at that age that they put everything in their mouth, do not print, for now, the connecting piece as it is too small.
For slightly older ages, you will learn that you can fit the cylindrical piece into any hole in the other pieces.
Finally, you can develop creativity by joining multiple pieces to make larger composite figures.
If you look at the piece that I call connector, you will see that it is not perfectly cylindrical since its diameter decreases in its central part. I designed it this way so that by placing the toroid in this area, it allows it to rotate freely as if it were a wheel, but at the same time prevents it from coming off. In this way, there is the possibility of creating mobile or rolling figures.
3d model print parameters
PLA
1mm walls and 0% infill
Use support only on the torus. But better if the concentric type of support is used, it will leave less marks and it wil...l be removed more easily
Do not use horizontal expansion in the pieces with holes so that those that are not in the horizontal plane are not deformed. Only use the horizontal expansion on the connector piece.
I recommend first printing the cylindrical piece that acts as a connector and a tetrahedron to be able to check its fit. It should fit with light pressure and the connector should not come off when turned upside down. If that does not happen, print new versions of the connector playing with the negative horizontal expansion if you have to apply a lot of pressure to insert it or positive if it is too loose.
Print a minimum of two pieces of each figure but of different colors.
I recommend printing twice as many toroid type pieces.