Okay kiddo, so a long time ago in Canada, there was a place called Porcupine. People went there hoping to find gold - which is a shiny yellow metal that is really valuable. When they found some gold, it was called a "gold rush" because everyone got really excited and tried to find more gold.
So lots of people went to Porcupine to find gold and they dug really deep holes in the ground to look for it. They used things called pickaxes and shovels to break up the rocks and dirt. It was really hard work!
But eventually, some lucky people did find gold and they became really rich. They used the gold they found to buy things they needed, like food and clothes, and some even built big houses.
The Porcupine gold rush was a really important time in Canada's history because it helped make the country rich and successful.