I started out with a city. It defended its self from BOMB. This is a common question for beginners, I had it, but didn't post the question... Have a look at the creations that get good votes, and attempt to make something better, but different, or whatever you find amusing that you think others would.

@elarctic
I started with a volcano

@elarctic
I started with a rocket. Great idea is a rocket, simple to build (use the walls) and fun to watch! Also, practically any liquid will work as a fuel!

I started with tic-tac-toe... but I am not normal. (Joking)

Depends on what you like to make.

Electronics:
The wiki is your friend. Also look at other electronic saves and try to understand them. Start simple (logic gates) then get more advanced (logic gates that do something)

Umm... I just deal with electronics, so thats it.

Oh and read the Do Not Suggest Four. You will save yourself the hardship of being cooked alive =D.

@shroom207
me too.

@shroom207
@PizzaPlatypus
same here.

now it has 330 votes

@Anmol444
Well done.
Good bai.

@elarctic
My second save was an engine, a hard challenge, fun, but absolutely terrible. I looked around all the other engines and found some decent ones ( @sparkjet's mainly). So I decided to make one.