Engineering tolerance

Engineering tolerance is when something is made to be a certain size, but it can still be a bit bigger or smaller and still work. It's like a margin of error for when things are built or put together. For example, if you build a house out of toy blocks, and those toy blocks are supposed to be 1 inch long, then you can still put blocks that are a bit bigger or smaller than 1 inch, and the house will still stay together. That's engineering tolerance!