Add a Solitaire button to any toolbar, a quick game is just a click away!

On the Main Menu Bar
1. Tools
2. Customize
3. In the newly opened dialog box Select Tools in the Categories list
4. Scroll down the Commands list and you will see a deck of cards

5. Click and drag the Card Deck icon to the toolbar of your liking.

Sidenote: I’m using Excel 2003 and have Windows Default games installed, I’m not sure of the availability on other setups.