I designed a propeller for a 3-6V DC motor. The propeller fits directly onto the shaft of the engine. The propeller has a middle hole that is neither too wide nor too narrow, so it can be easily attached to the engine. I think it is very suitable to use in your projects.

I designed a model that can be attached to the edge of a desk to easily collect dust from the surface. Later, you can simply remove the bottom tray and empty it into the trash. Hope you like it!

I made a protection case for Arduino Uno. No screws needed to use this case. You may have a little difficulty putting it on and taking it off at first, this is completely normal. Since the container is tight, it is also sturdy, the Arduino does not fall even if you hold it downwards.

I designed a nice tool to elevate your computer slightly off the desk. I hope it will be useful to you