Ba Dum Tss: Joke Assistant and Rimshot Sound Effects for Kids is a free iPhone app developed by Scott Adelman Apps Inc. It is designed to assist kids in telling jokes and guaranteeing a laugh.

With Ba Dum Tss, kids can choose from three different sound effects to accompany their punch lines. They can use the classic ba dum tss rimshot, the not so great joke trombone sound, or a laugh track when needed. The app is easy to use - simply press the corresponding button, watch the owl react, and get the desired sound effect.

One of the best features of Ba Dum Tss is that it is completely free, with no third-party ads or in-app purchases. This app was created at the request of the developer's son, with the hope that other kids will have fun using it too. If you enjoy Ba Dum Tss, be sure to check out the developer's other apps as well.