Widgets . . . Gadgets . . .
. . . "by any other name would smell as sweet"
It is easy to add gadgets to the blog directly from Blogger. These gadgets display on every page. Unfortunately, widgets from the web can only be embedded in a single post. Both can be accomplished easily, however. The process seems straightforward and trouble free.
You'll find one of my favorite old-time games, Tetris, at the bottom of the page, and here is a bit of history for you.