Fully printed (excluding metal screws) and interactive construction set.
Allows your child to develop fine motor skills and become familiar with gears.
The model is functional and even allows you to knead real concrete in it. Your kid will be happy))
The recommended age of the child is 4-7 years old, but a 30-year-old will be OK ;)

In the example, the model is printed with PETG plastic, nozzle 0.6mm, 3 walls, 4 tops and them, infill 15%.
For the overhanging part frame left1/2_pt1, a plastic bridge is desirable, formed using a 45 degree orientation. Printing does not require support.

*Assembly requires 16 standard 25mm drywall screws, for the central axis of the barrel it is better to use a self-tapping screw a little longer and thicker.
*You will also need a screwdriver or an electric screwdriver (preferably a small one for children))