Thanks for your question! I think the best way would be to find a skill that will help you accomplish what you’re after.
For the laughter, I found a skill called “Laugh Box” that fits the description. Once you’ve enabled it, you should be able to say ““Alexa, open laugh box” to get the audio you want.
For the clapping, I found a skill called “Applause” that sounds like it could work. Once you’ve enabled it, you should be able to say ““Alexa open applause” to invoke the skill.
You can also experiment with adding those skills to routines!
Hope that helps!