Okay kiddo, let's talk about something called the Constitution Act, which is basically a big book of rules that tells us how Canada is supposed to run.
One of the rules in this book is called section 91(2). Imagine that it's like a special job that only certain people can do. This job is all about making laws and rules about things that affect the whole country, like trade and taxes.
Now, in Canada we have different levels of government. There's the federal government, which is like the boss of the whole country. And then there are provincial and territorial governments, which are like smaller bosses of their own areas.
Section 91(2) says that the federal government gets to do this special job of making laws about important things that affect the whole country. It's like the boss of bosses when it comes to things like trade and taxes.
But wait, there's more! Section 91(2) also says that the federal government can delegate some of its power to the provincial and territorial governments, kind of like sharing the special job. This means that sometimes, the smaller bosses get to help make rules about things that affect everyone too.
So basically, section 91(2) is just a really important rule that says the federal government has a special job of making laws about important things that affect the whole country, but sometimes it lets the smaller bosses help out too.