What can I make on minecraft (survivel)?

I've been playing minecraft for a while, killed the ender dragon and everything and I want some ideas on what to make. I have a huge piramid a big castle, bug house and a farm. Is the anything else?

Minecraft tconstruct what does each part do?

So say I'm going to build a broadsword, clearly the blade decides what the damage modifier is. But for the wide guard and tool rod, what difference does it make to have an iron tool rod instead of a flint one?

Games with DigitalLogic/LogicGates?

The obvious answer is minecraft, or just a circuit simulator- but i was looking for something a little more. - something like space engineers, but with digital logic; are there any other games like this out there? (i would prefer if the game had decent graphics, but i'm more interested in creating cool things.) :)

Could Minecraft damage my MacBook Air?

I play minecraft on my MacBook Air. After about 5-10 minutes of playing, my mac gets very hot and the fan runs extremely fast. I bought it last year in February, so it is just over a year old. I'm really concerned that the heat/fan intensity is going to damage my mac over time. I plan on keeping it for 4-5 more years.

So, could the heat and fan intensity damage my Mac?

BTW, I use a heating stand to elevate it.