It is the question we field more than any other, usually over the phone, usually from a parent who has already half-decided and is looking for permission. And the honest answer is that age is the least useful thing to go on.

We have had six-year-olds who were not ready and five-year-olds who were. What actually separates them comes down to three things — and you can check all three at your kitchen table tonight.

1. Can they follow a two-step instruction?

Not perfectly. Not every time. But if you say “put your shoes on and meet me at the door” and it lands often enough, your child has the working memory a beginner class asks for.

This is the single best predictor we know of. A class is a rolling sequence of two-step instructions — hands up and step back, turn and block. A child who can hold two things in their head at once has a good first class. A child who cannot yet will spend the hour watching the kid next to them, which is tiring and not much fun.

2. Can they be away from you for forty minutes?

Not happily. Just possible. Preschool, daycare, a birthday party where you were not in the room — any of those count.

Parents sit right alongside our floor, so nobody is truly separated. But a child who cannot yet be more than an arm's length away will spend the class looking over rather than at the instructor. That is not a failure of character. It is a stage, and it passes, usually faster than parents expect.

The short version

Two-step instructions, forty minutes of independence, and some interest of their own. Two out of three is usually enough to start. Three out of three and they will do well.

3. Is any part of this their idea?

This is the one parents skip, and it is the one that decides whether you are still coming in March.

It does not have to be much. They liked a movie. A friend at school does it. They saw the belts and want one. Any thread of genuine interest gives us something to build on. A child who has been signed up purely because a parent decided they needed discipline will figure that out inside three weeks, and the whole thing becomes a fight about Tuesdays.

If your child has no interest at all, our honest advice is to wait. Bring them to watch a class instead. Sometimes seeing other kids doing it is all it takes.

Not sure? Come and find out.

A free class costs you an hour and tells you more than any checklist can. If we think they are not ready yet, we will say so and tell you when to come back.

What about the child who is shy?

Shy is not a reason to wait. Shy is often the reason to start.

A large share of the students who walk through our door are the quiet one in every room. We are set up for it: new students get an instructor alongside them for the first few classes, nobody is called out in front of the group before they are ready, and we never use the “demonstrate this for everyone” move on a beginner.

The kid who would not speak up in class starts raising a hand. Parents almost always notice it at home before they notice it here. — something we hear at pickup most months

And the child with a lot of energy?

Also fine, and also common. Martial arts is unusual among children's activities in that it gives a high-energy child somewhere legitimate to put it, inside a structure with very clear lines. The structure is the point. It is not there to suppress anything — it is there so effort has somewhere to go.

What we will not promise is that it fixes behaviour on its own. It helps, often a lot, but it works alongside what you are already doing at home, not instead of it.

Still not sure?

Call us and describe your kid. We have had this conversation thousands of times and we are not trying to talk you into anything — a student who is not ready is no good to anybody, including us. If the answer is “give it six months,” that is what we will tell you.

Otherwise, come and try a class. Our Kids programme runs at both our Hazelwood and Florissant studios, the first one is free, and there is nothing to sign.