How to play multiplayer minecraft through LAN, when both computers have the same IP Address?

How to play multiplayer minecraft through LAN, when both computers have the same IP Address?

Added (1). My two sisters want to set up minecraft so they can both play multiplayer together, through LAN.
We have tried to open a game to LAN on one computer, then have the other try to use direct connect method, but the second computer/minecraft doesn't connect. When they try to scan for a game on our local network, nothing comes up either.
They both have separate minecraft accounts but are both using the same IP address.
Are we doing anything wrong?

Does anyone have an animation idea?

Me and my friend have a YouTube channel, and we do really bad Minecraft animations, and we can't think of an animation idea! We do them short and simple, the longest is 30 seconds!

What performance will I get?

I7 3770
8GB RAM
500 GB HDD
MSI R9 270X
500+80 W

What kind of FPS am I looking at on ArmA 3, BF4, CS: GO, TF2 and Minecraft at highest settings

How to kill trapped zombies on Minecraft?

I built a simple experience farm, 3x3 hole below a spawner with water to push them down. They almost die at the bottom and I would like to build something to finish them all off with the flick of a switch. The ONLY problem is that pistons are not an option. I also do not want to use Lava or TNT. I just need to deal some extra damage. Any ideas?

What video games do more people have?

Please tell me how many have them aswell, and these are from all years and are franchise.
Call of Duty
Halo
Battlefield
Minecraft
DC Universe
Destiny

MINECRAFT WATER TEMPLE! Can it spawn buried under sand?

MINECRAFT WATER TEMPLE! Can it spawn buried under sand? - 1

Added (1). We have guardians all of 10 blocks out from our island, our other file with the same seed number has it spawned elsewhere. I don't see it anywhere and all i have found is that guardians should only be with the temple! The reason why I believe it to be buried is because mounds of sand formed in the vicinity but i don't have enchanted armor to find out.

Why is Minecraft not working in Windows 10 Home Edition?

I just bought and setup my new gaming laptop with Windoes 10. When i tried to install minecraft it said it was downloading and installing runtime or something like that. Then it said its setting up runtime. Then i get this error that says, "Unable to start the Minecraft Runtime Enviroment. This is most likely caused by a corruption. Please try to reinstall Minecraft". The only option is to hit "ok". And i've already tried reinstalling minecraft and it gives me this same thing every time. What should i do to fix this?