The concept is pretty simple.... give them the container with the flap open that has the small holes for shaking (not the large spoon one) and a pile of Q-Tips. Show them how to drop the Q-Tips in the holes and then let them have at it! This is a fantastic activity for working on fine motor control, not only for picking up and holding the Q-Tips, but also getting them into the little holes.
To take it up a notch, we also practiced our counting each time we put one in which is a great way to reinforce numbers while playing. The boy-o had a great time putting all the Q-tips in, and then unscrewed the lid himself to dump them out and started over again!
Because we used the small container size, it'll be really easy to toss in a carry-on or diaper bag for travelling purposes, and when not actively in use, you can just store the Q-Tips right inside the container. Since the Q-Tips aren't actually being used for their intended purpose, I'd definitely just recommend buying them from a dollar store making this simple little activity incredibly inexpensive as well.