We have a computer used by multiple children who are constantly fighting over who's turn it is. I'm looking for some software that will have logins for each kid and keep track of how long they have been on. Does anyone know of something of this nature?

We have a computer used by multiple children who are constantly fighting over who's turn it is. I'm looking for some software that will have logins for each kid and keep track of how long they have been on. Does anyone know of something of this nature?