In the October session of the class, I gave out chocolate for first correct answers to a trademark quiz I conducted in the class.
I assembled trademarks similar to the ones that you used to give out, but added some newer companies.
I made a PowerPoint Slideshow with each slide being a different trademark and the owner of the hand that went up first after I showed the slide, got to guess.
If their guess was correct, they got a small Hershey bar and had to wait out the next three slides in order to give other students a chance to win.
It was fun and challenging work to find trademarks without words or letters to use in the quiz.And the students did enjoy it.