[Fuhu Nabi 2] aicjofs:
Again the Nabi general information thread is going to be the biggest help in understanding what needs to be done. That information is here http://xdaforums.com/nabi-2/general/nabi-information-t3229119 The procedure below isn't as long as it looks I tried to add some troubleshooting stuff along the way.

Best to have a mircoSD card for this well at least 4GB. Start with the microSD in your computer if possible.

1) First you will need to grab all the files you need:

-Drivers: Refer to drivers section #4 in the General Info Thread. Your choice if you want to try PDAnet, NabiLab, or Universal Naked Drivers. The NabiLab drivers are self installing and work pretty good in a lot of situations but not always. Download which ever one you choose to your computer. I'm going to talk about Nabilab and Universal as first resorts, we will revisit PNAnet if you are having driver issues.

-ADB and Fastboot tools. Here it's best to refer to section #6 in the General Thread. Specifically:

Download and install this package(pay attention to where you install this as you will likely need to put files in there later): http://xdaforums.com/showthread.php?t=2317790

From your start menu select "Minimal ADB and Fastboot" this should open a command prompt where you can type commands

If you didn't pay attention or forgot where you installed the files, at the command prompt that opens type "explorer ." The period is important, explorer <space bar> and a period. So type what is between the quotes.

-TWRP for the NABI2S. Get that file here: TWRP for Nabi2S

After this step you should have downloaded 3 files and the ADB/fastboot files you should have installed. That leaves the remaining 2 files. One should be NABI2S_TWRP271.img, copy that file to the folder where you installed ADB/fastboot(remember you can find that folder by selecting Minimal ADb and Fastboot from your start menu and typing "explorer ." as explained above.) The remaining file is the which ever driver package you picked. If it's universal naked extract the zip file to a place you know. If it's Nabilab drivers go ahead and install them. PDAnet we will try later if these 2 don't work.

2) Boot the Nabi to fastboot with the USB cable plugged in to your computer. Also open device manager on your computer so you can see when the interface comes up. I don't have a Nabi2S so this may be not exactly right. Start with the tablet off. Press and hold the power button AND the vol up buttons at the same time. At some point you should boot up and have a small text menu in the top corner of the screen.(If that doesn't work try power and vol down buttons). One of the menu items will be fastboot protocol. You will want to highlight that text using the volume keys, and then select it using the volume keys.(again I an not sure which is which. Vol - might change which is highlighted, and vol + will select that line, or vice versa, remember which does does what as you will need it later on). Keep trying combinations or timings if it's not working. When it's right your computer will acknowledge a new device plugged in and the device manager screen should show a fastboot or unknown interface.

3) Getting the drivers working. If you chose the Nabilab drivers they should automatically install, and in device manager you should see and item called Android device, and when expanding that entry some bootloader or fastboot interface(When you see this you should be done with this step). The tablet will also switch the text on the screen to say something like "continue", "bootlader", blah, blah. If you went with universal naked drivers this is where you would locate the unknown or fastboot device with the yellow exclamation mark and manually install the driver by pointing them to the folder you extracted(There could be driver signing issues depending on which version of windows you are using. You will have to google "disable windows driver signature enforcement", but basically you will reboot the computer disabling driver signature enforcement. Hopefully if you picked the Nabilab drivers and they work on your computer this step will be pretty painless and not as long as it looks.

4) Unlocking the bootloader. If you have the command window open now great, if not from your start menu select "Minimal ADB and Fastboot" this should open a command prompt. REMEMBER this step will erase all you data on the tablet, game saves, pictures, etc.

Get ready to acknowledge some text on the tablet itself as you have to be pretty quick using the volume keys to highlight and select(Same function as what you noted in step 2). At the command prompt type:

fastboot oem unlock

OR

fastboot -i 0x0489 oem unlock

On the tablet some text will pop up asking yes or no do you really want to unlock the bootloader? The selection is made with the volume keys. You should see some confirmation of erasing tablet and completed.

If this step isn't working when you type the command i.e. "waiting for device" the drivers probably still aren't installed correctly. If something failed in this step you may be forced to reboot the tablet and get back in fastboot mode(step2)

5) Install TWRP. With tablet in fastboot mode. Type at the command prompt:

fastboot boot NABI2S_TWRP271.img

or

fastboot -i 0x0489 boot NABI2S_TWRP271.img

If you are getting file not found errors the NABI2S TWRP file isn't in the folder. If all goes right the tablet will boot to TWRP. This is where we may have problems as I'm not sure if the NABI2S TWRP can boot the Star Wars Nabi. If it's not booting then we are pretty much done at this point... :(

6) Getting SuperSU(root). If the tablet booted TWRP. Download this UPDATE-SuperSU-v2.46.zip. Copy that file to your microSD you have inserted in the computer. When that is done safely eject the card from the computer and put it in the tablet.

7) In TWRP select the "mount" tab and check MicroSD(external storage) and the check box should become checked.

8) Make a backup. Select the "backup" tab in TWRP. You will have the options to backup "recovery" "boot" "system" and "preload(or addon)" select all 4 of those. Then select the backup location as MicroSD(external storage). Swipe to backup.

9) Only if step 8 worked install root. Select the TWRP "install" tab. Back out to the highest level, and find external_storage. The UPDATE SUperSU zip should be there. Select it and swipe to install.

10) Only if the step 8 and 9 worked go to the "reboot" tab and reboot. If they didn't work. Press and hold the power key until the tablet shuts off, and we can troubleshoot. If you rebooted the tablet will take a long time to boot initially since you wiped the tablet and it will have to rebuild data. You can then reset up the tablet.

11) Get superSU from Play Store and verify root.

12) If all this work your backup will likely be a benefit to future users so sharing it might be something to consider.