Choosing a first coding robot

Coding robots look interchangeable in photographs and are not. The differences that matter are almost all practical rather than educational, and they decide whether a kit is used for a year or for a fortnight.

Here is what to compare, roughly in order of importance.

How the program is entered

Buttons on the robot, cards fed through a reader, tiles on a board, or an app. Each suits a different age, and each has a different failure mode. Buttons are simplest and limit program length; cards make the program a visible object; tiles allow longer programs; apps allow everything and add a device.

For a first robot under seven, buttons or cards.

How long a program can be

This is the specification most likely to be outgrown. A robot that stores ten steps is fine at four and frustrating at six. Where a maker states the limit, it is on the listing; where they do not, it is worth asking.

Twenty-plus steps, with repeats, lasts considerably longer.

Does it come with a mat

A grid mat is what turns movement into planning. Kits sold without one are cheaper and are noticeably harder to use at home, because a floor has no reference marks.

Some kits include cards and a mat; some sell an activity set separately. Check which you are buying.

Turning and stepping

Fixed-distance steps and ninety-degree turns are predictable and therefore plannable. Continuous or timed movement is more like driving and much harder to program deliberately.

For learning, fixed steps are the ones you want.

Power

Rechargeable is tidier; replaceable cells mean the robot works while another is charging. For a classroom, cells; for a home, usually rechargeable. Either way, check whether a cable is included.

Battery life on these is generally hours rather than minutes, so it is rarely the limiting factor.

Build quality

Enclosed wheels, a rounded shell and a screwed battery door. Exposed gears collect hair and carpet fibre, and an unsecured battery door is the most common reason a robot stops working.

Ranges built for schools are usually the more durable ones.

What is actually in the box

Robot, cards, mat, cable, batteries, activity guide — very few kits include all six. The gap between what is pictured and what is included is the most common source of disappointment on a birthday.

We list the contents as the manufacturer states them.

Expansion

Additional cards, extra mats, obstacle sets and character shells extend a kit’s life cheaply. A robot with no expansion path is a fixed purchase; one with accessories can grow with the child.

Worth checking before committing to a system.

Noise

Some of these are loud, and a robot that beeps at every step is tiring in a small flat. Where a volume control or a mute exists it is worth having.

This is rarely mentioned on packaging and is frequently the reason a toy gets put away.

Group use

If more than one child will use it, card and tile systems work far better than a single set of buttons, because several children can handle the program at once.

This also applies to a household with siblings of different ages.

Price and what it buys

The step up in price on this shelf mostly buys program length, build quality and expansion rather than cleverness. A cheap robot that only holds eight steps is not a smaller version of an expensive one; it is a shorter-lived one.

If the budget is tight, a simple robot with a mat beats a complex one without.

Where to look

Screen-free coding robots for a first kit, app and remote robots for older children, and robot building kits where building is the point.

Age bands and contents are on every listing; the counter is on the number on the contact page.

Buying one as a gift

Coding robots are a common present and have an unusually high rate of quiet disappointment, almost always for practical reasons rather than educational ones. The three that cause it are a missing mat, a required tablet nobody mentioned, and an app that needs an account set up by an adult before anything moves. All three are visible on the contents list before ordering.

If you are buying for a household you do not know well, the safest choice is a screen-free robot that includes its own mat and cards and runs on ordinary cells. It works within a minute of the box being opened, on Christmas morning, without wifi, and without anybody having to find a charger. That reliability is worth more than any additional feature at this age.

It is also worth asking the household whether a robot already exists. These systems do not interoperate, and a second robot from a different maker means a second set of cards, a second mat and a second app, none of which combine with the first.