Explain to a fourteen-year-old how to run a power query on Excel
Let's say that you have one sheet, which has two columns: "Toy Name" and "Toy Size." We'll call this the "Size Table." Then, let's say we have another sheet, which has two columns: "Toy Name" and "Toy Cost." We'll call this the "Price Table."

Notice that the Size Table and the Price Table both have the "Toy Name" column. Our goal will be to make a new sheet that has the "Toy Name," "Toy Size," and "Toy Cost" all at once. 

To do this, we'll want to do the following steps:

1. Hit the Ctrl + T keys with one of the toy names clicked, once on the "Size Table" and once on the "Price Table."
2. Go to the "Table Design" tab for each, and change the "Table Name" from "Table1" and "Table2" to "SizeTable" or "PriceTable" (whichever sheet you're on).
3. Go to the "Data" tab for both, and click "From Table/Range" for both.
4. Click "File," then "Close/Load To," then "Only Create Connection," then "OK" for both.
5. Click "Data," then "Get Data," then hover over "Combine Queries" and click "Merge."
6. Select "SizeTable" on the top and "PriceTable" on the bottom.
7. Click the "Toy Name" column on the top and the bottom so it's blue in both places and click "OK."
8. Click the symbol with the left and right-pointing arrow on the blank column. Mark the checkbox next to "Toy Cost."
9. Click "File," then "Close/Load To," then "OK."

You should now have a table with three columns: "Toy Name," "Toy Size," and "PriceTable.Toy Cost."