O rights of the child are the most important, or is that too simplistic? See UN Convention on the Rights of the Child en.wikipedia.org/wiki/Convention_on_the_Rights_of_the_Child for details of it.
These conventions and acts are the basis for arguments about, for example, whether the children of asylum-seekers can be lawfully held in detention centres with their parents or whether parents can smack their children.
The Human Rights Act is often the origin of arguments over the rights of travelling people to inhabit certain land, the treatment of detainees, the use of CCTV cameras, all kinds of things.
So these laws really do matter. Unfortunately, they're rarely explained very well in mainstream media reporting, especially when it suits journalists/politicians to give one skewed opinion or another of the implications. It's great that you're learning about them and will be helping kids to understand them as part of the principles that underpin our society.
Wikipedia is usually a reasonable bet for an introduction to things like this. The BBC often has some helpful archives as well and Amnesty International should have all kinds of resources as well, like Liberty. And, believe it or not, the US State Dept's site often has fantastic info about "foreign" countries on it.
Best of luck.