I have a hair question

[TrickyBob]

I don't know how to phrase it, I want to say "ethnic" or "black" hair but I don't want to be a jerk or insult someone. I don't know the right terminology here so don't judge my lack of knowledge.  

But I was out with a friend yesterday and we saw the cutest little girl and she had her whole head in purple and white beads. She was running all over the office and just the cutest little thing; ever. 

How do the parent's manage that hair style? Do the beads come out every night? Do they stay in for a few days/weeks? And don't the beads hurt to lay on? 

I just had so many questions. I know I was watching a woman on youtube who was able to pin curl her hair and have it last for a few days at a time, in various styles. And it got me thinking about how long the beads last for that little girl and how you manage the hair/beads.