Short answer: Preparing a shy child isn't about making them louder. It's about helping the real child come through in a short conversation. Three things do almost all of the work: aim the conversation at something they genuinely love, teach one pause phrase ("Let me think about that for a second"), and practice adding a single sentence to short answers instead of memorizing full ones. Then stop. A relaxed child who sounds like themselves outperforms a drilled one, and the quiet kid is the one parents worry about most and need to worry about least.
If your child is shy, gets quiet under pressure, or needs a moment before they answer, the upcoming interview is probably keeping you up a little. I want to reframe it for you, because I spent twenty years on the other side of that table, and the quiet kid is the one parents worry about most and need to worry about least.
Here's what I learned reading thousands of kids: the smooth, confident talkers rarely stood out. The children I remembered were curious, said something honest, and came alive when we reached a topic they actually cared about.
A reserved child lighting up about one real interest is more compelling than a polished child performing enthusiasm, because one is genuine, and interviewers can always tell the difference.
So preparing a shy child is not about making them louder. It's about making sure the real child comes through to a stranger in a short conversation. Three things do almost all of the work.
Aim the enthusiasm
Find the thing your child genuinely loves, lizards, drawing, how engines work, whatever it is, and let the practice conversation go there. The subject doesn't matter to an interviewer; the spark does. A quiet kid talking about a real interest stops being quiet.
Teach the pause, not the answers
The most common way a shy kid struggles isn't talking too little, it's blanking, the mind going empty under pressure. The single most useful thing you can give your child is one sentence: "Let me think about that for a second." It's allowed, it sounds mature, and it turns a scary silence into a normal pause. Practice it until it's automatic.
Build out, don't script
If your child gives one-word answers, practice adding a single sentence, a reason or an example. "I like soccer" becomes "I like soccer, and I like that you have to think fast." That's the whole technique. Resist the urge to hand them full answers to memorize: a rehearsed child falls apart the moment an interviewer asks a follow-up they didn't practice.
The mistake I see most often
Which brings up the mistake I saw most often, and it came from loving, well-meaning parents: over-preparation. Past a certain point, rehearsal makes a child sound rehearsed, which is the exact thing that works against them. You are done preparing when your child can talk comfortably about a few things they like and reach for "let me think about that" on their own. Stop there. A relaxed child who sounds like themselves will always outperform a drilled one.
On the day
Remember the room is rooting for your child. Interviewers aren't hunting for wrong answers; they're hoping for a moment of something real. And one quiet note for you, the parent: in any practice run, watch your own urge to jump in and answer for your child. Let the pauses happen.
Your shy child is not behind. Handled gently, they may be exactly the kind of thoughtful, genuine kid an interviewer remembers.