How many players can play when playing on a console? if I have 5 kids who want to play each other is it best that everyone has their own device and use my Wifi?
Up to four players can play Minecraft at one time on the console, because there's a limit of four controllers. For five kids that want to play together, your best option is to get either the pocket or computer editions and everyone can join the world over wifi - and yes, each kid will need their own device.
Also you can look into Realms, which is an easy way to host a server so that lots of people can play at one time on the same world without needing to be in the same house. It's run by Minecraft and costs about $13 a month.
Hope that helps!