Key takeaways
- A child who will do ninety minutes on rough ground will manage everything else.
- Generally better than the adults with them, in fact.
- Six hours, mostly outdoors, with a wait in the middle.
- None is published, and this page will not guess one.
The question is the walk
Parents ask about the hole and worry about the hole, and the hole is not the problem.
Being lowered on a platform is passive, brief and supervised, and children generally handle it better than the adults they arrive with, for the straightforward reason that they have fewer preconceptions about what a hundred and twenty metres means.
The walk is the deciding factor. Forty-five to fifty minutes each way across uneven lava under moss, in whatever the plateau is doing, with no vehicle access and no shortcut if it goes wrong.
So the test is simple and it is one a parent already knows the answer to. Will this child walk for ninety minutes on rough ground, in cold wind, without being carried? If yes, the day works. If the honest answer involves carrying, it does not, because you would be carrying them across a lava field.
The age question
The operator publishes no minimum age for this tour, and this page is not going to invent one on their behalf.
What can be said is that the constraints are physical rather than nominal: the walk, the length of the day, the cold, and being able to follow instructions on a platform and inside a roped area. A capable ten-year-old who hikes may be a better candidate than an unenthusiastic fifteen-year-old who does not.
If you want a definitive answer, ask the operator when booking. They deal with this question constantly, they know their own equipment and harness sizes, and their answer carries authority that a third-party page cannot.
What children make of the chamber
By every account, a great deal. This is one of the few genuinely extraordinary places that does not require any background knowledge to appreciate: it is enormous, it is coloured, it is dark, and you got there in a cage on a rope.
The guides are used to children and tend to be good with them, and a party of five with a guide is a far better ratio for a curious child than any museum.
The one thing worth preparing them for is the cold and the standing still. An hour is a long time for a child with nothing to do, and the chamber rewards patience and looking rather than activity. Children who are told in advance that the job is to look tend to do well; children expecting something to happen can find sixty minutes long.
A family on the path across the moss
The length of the day
Six hours, plus driving at either end, mostly outdoors, with a substantial wait at the crater while parties go down in turn.
That wait is the part to plan for with a child. It is at an exposed rim, it can be cold, and there is nothing to do. Bring something for it, and bring the warm layer out of the bag before the child gets cold rather than after.
Food is at the end rather than in the middle, which is worth knowing. A snack in a pocket for the walk or the wait is a small thing that changes the mood of a family day considerably.
Preparing them for it
A little groundwork beforehand changes the day noticeably, and it is the sort of preparation children enjoy anyway.
Tell them what the machine is: a cage on a rope through a hole in a mountain, going down further than most buildings are tall. Tell them the walls move away instead of closing in, which is the surprising bit and is much better as a prediction they get to check than as a surprise.
Tell them the volcano is asleep and has been since long before anyone lived in Iceland, because a child who has heard about eruptions on the news may reasonably want that addressed rather than deflected.
And tell them the job at the bottom is to look and to ask the guide things. A child with an assignment does far better in a dark room for an hour than a child waiting for the next event.
What they should wear
The same as everybody else and with less margin for error: proper boots with ankle support, warm layers, and a windproof outer. Small bodies shed warmth quickly and say so early, which is at any rate an efficient warning system.
The hut provides helmets and harnesses and puts them on you. If you have any doubt about sizing for a smaller child, raise it when booking rather than discovering it at the fitting.
Gloves and a hat that covers the ears are worth more here than any other item, because the wait at the crater is the coldest part of the day and it is the part nobody dresses for.
Is it worth it for a family
For the right child, it is one of the best days available in Iceland and it is not close. There is no substitute anywhere, the guides are engaged, the group is small, and the thing at the bottom is genuinely astonishing rather than merely nice.
For a child who will find ninety minutes of rough walking miserable, it is an expensive and cold way to have an argument three kilometres from a car park.
You already know which of those you have. The rest of the planning follows from it.
