Hi there! If you would like to use this font in any commercial products for sale, you can purchase a lifetime commercial license here (recommended for designers and creative agencies):
https://www.creativefabrica.com/product/k26-rambunctious/ref/2141/
Dafont Users (commercial use): If you would prefer to stay on-site, simply use the Donate to Author button on the right to purchase a lifetime commercial-use license.
(Note: This font is offered free for personal, non-commercial use, but if you like the font so much that you would like to make a small donation to my font fund, I certainly wouldn't object.)