I’d like to introduce you to my latest build - The mobile Volumio:
It basically is a Raspberry Pi 3b with a Display and build in Speakers and Headphone-Jacks, powered by a Powerbank and nicely wrapped in a IKEA Variera Housing.
The Powerbank lasts for about 4 hours with the Display on, I think when I get the DPMS right it will be more.
I also added a stylish handle and an illuminated Powerswitch to turn the Raspberry on and off.
It is not very audiophile, as I used the Rasperrys Audio-Jack with a cheap 3W amp from some USB-powered Speakers, but it is enough to keep the Kids entertained.
You’re welcome to comment below 
