Why don't you print something about the fireworks? Advertising them? Then, put it in the candy boxes, and the people who buy the candy will also buy the fireworks!
11 seconds sound clip from the You Can't Take It with You (1939) classic radio play.
You can hear this line at 00:16:03 in the radio play.
Quote context
[...]
- Er, let me see. Er, I know! The Russian Revolution! Plenty of fireworks there!
- Why, that's brilliant, Mr. Poppins.
- What do you think of it, Ed? The Russian Revolution!
- I think it's swell. Say, you've got swell ideas, Mr. Poppins.
- Say, maybe you've got something you'd like me to set up on my printin' press.
- Say, that's great! Listen, how does this sound?
- 'Watch for the Revolution! It's Comin' Soon!' -Fine!
- We got a lot of these Red Flag firecrackers left. You could write about them, too!
- Sure!
- 'Red Flags will sweep the country! Get your Red Flags from Sycamore!'
[...]