You can use the already existing "Products" widget and tweak its settings.
Go here: The Factory > Your Store > VIEWS > WIDGETS > Products > Product list module > Settings (
Set the query string to the product ID you want to display like this (where the ID is of the product you want to appear):
You can display multiple products by separating product IDs with commas:
You can also duplicate the view if you need additional product sidebars.