There a lot of things you can say with fireworks! Happy birthday, Thank You, Happy Anniversay, Hooray it's Friday ... the list goes on. You can make fireworks gifs for all of them and most you can personalize. And you can customize more than just the message.
Many of our fireworks gifs have images options beyond just fire. Use the image icon to open the image selection box.
As you can see above, you can upload your own replace image for the green flare, or use one of the included images - like hearts, stars, etc.