Best exercises to tone arms fast?

I've been using the YouTube videos by Tiffany Anne and they are working well!

You can't spot reduce fat. The best way to get "toned", aka build muscle and lose fat, is to eat a clean diet, drink lots of water, and weight train! Make sure you're training all upper body (back, shoulders, biceps, triceps), not just one muscle group.

I have a basic set of dumbbells in the apartment. There is a gym at the complex that has a lot more equipment!