Funny but it kinda bothers me that the resistors aren't capacitors...

Y'all got any uses for 0 ohm resistors?

Radio Shack store closed near my house. Had a huge fire sale. Electric circuit components were 90% off.
My wife thought I'd gone insane when I got home with two huge bags full of LEDs, resistors, switches, IR sensors, photocells, capacitors, bridge rectifiers, a spare breadboard, a pair of helping hands, etc.
My only regret is that I didn't catch the fire sale in time to grab all their Arduinos.

My company decided to hire a new director at the electronics shop. There are certain hours when we have a lot of clients. So the guy had to man a cash register.

Client: I need 2 kilo resistors

The client obviously needed resistors of two kiloohms.
The director rushed out to the warehouse and came back with 2 kilograms of resistors to the gram

How can someone be so retarded! ¿

When you order a bezillion tiny things at small prices to avoid toll on one large package, and you have no fucking clue if everything has arrived.

Arduino stuffs, LEDs, resistors, stuffs like that wherever its cheap for those wondering.

The IT guy my parents had often at their home.

This guy thought me how to manage our network, how to create mobile apps. How to debug problems and so on. He sparked so much interest for computers in me and now i can't stop fiddleing around with computers.

Also this "electrician" who worked for my parents.
Basically he fixxed old keyboards, loudspeakers and stuff like that. He thought me about resistors, transistors, blue prints and how to solder stuff.

"Lötzinn blödsinn"

They both started my journey into the rabbit hole of technology.

I have a 16 year old son who is off-and-on showing interest in learning electronics. He wants to work for NASA someday. I’ve looked at dozens of Arduino and Raspberry Pi kits but I feel like he would benefit not so much from “mostly done for him” types of kits that are more like toys, but the kind that teach more fundamentals like resistors, capacitors, transistors, relays, etc. In other words, knowing first what the principles are behind the fancier kits. Do any of you have a recommendation of kits that start with the fundamentals, but that can still be inspiring and engaging?

Any recommendations for introductory books on electrical engineering? I'm looking for something that goes into detail on the basics: tension, current, resistance, inductance, capacitance, etc. I have very little knowledge on the subject (I know what the basic components do and that's it) and I found myself struggling a bit with the most basic concept: voltage.

I grabbed my multimeter, a few resistors and a battery and played around a bit. For some reason it doesn't really "click" why on a 5v circuit with 3 2.2k ohm resistors (I think) the voltage around each resistor was like ~1.3 volts or something, while on a circuit with 2 resistors the voltage accross each one was ~2.3 something volts (I don't remember exact values). Like, I know that voltage is a difference in potential, but I still don't get it and idk what I'm missing. Why is the difference in potential accross a resistor different if the circuit has 2 resistors in series instead of 3. It kinda makes sense in my head but at the same time it doesn't.

In short, I want to know the "why" stuff works the way it does, not just the "how".

Also, if the book covers common practices, components, and circuits that'd be very helpful. I want to learn how to build well-designed, reliable and safe circuits.