Funny, I just bought my first RPi in order to run Pi-Hole. It works decently from my daughter's tablet. I enabled it on the router so the whole house is covered, but due to uBlock I hardly ever see ads on computers. The nice thing is having "boring text" instead of colorful ads on tablets makes them a much smaller target for kids to tap on.
I will say that the installation process can be somewhat painful if you deviate from the norm. I didn't want to use Google DNS and instead opted for OpenDNS, plus I wanted my own directory structure, etc...