Here's a website where you can easily make a faked tweet to trick your friends.
It is divided into two areas:
the top of which allows you to enter user information, tweets, dates and times, as well as tweet stats.
You can see a preview of how the tweet will look at the bottom of the website, as well as a button to download the tweet to show to your friends. (as of now the downlod button takes a screenshot and outputs it bellow the preview, you will have to manually save the picture)