Alright kiddo, do you know how we measure things like length, weight, and volume? We use units like inches, pounds, and gallons.
A long time ago in Scotland, people used different units than we use now. These units were called obsolete Scottish units of measurement because people don't really use them anymore.
For example, instead of using feet to measure length, the Scots used a unit called a "Scots ell." It was a bit longer than a regular foot, which can be confusing when people from different places tried to talk about how long something was.
Similarly, instead of using grams and kilograms to measure weight, they used units like the "stane" (which means "stone" in Scottish). A stane was about 14 pounds, but that's a lot of weight for us to carry around nowadays!
Another example is the "firlot," which was used to measure volume (how much space something takes up). It was equal to about 4 gallons.
These units of measurement were used for a long time, but eventually people realized it was easier to use standardized units that everyone could agree on. Now, everyone around the world uses the same units of measurement so we can all understand each other.