Quick answer: The present isn't the hard part. The hard part is that it's going to live in a house you don't control, be assembled by someone who isn't you, and need to fit a child you last measured in August. All three are solvable in one phone call to the parents, and that call is a lot less awkward than it feels.
Here's what to sort out before you order, in the order it matters.
Already know what you want? Send us the child's height and we'll tell you which one fits before you commit. It takes us a minute and it's the single best thing you can do from a distance. Get in touch →
Yes, ask the parents
We know. It takes the surprise out of it, and the whole point was to turn up with something nobody expected.
Ask anyway. A bike or a scooter is not a jumper — it needs somewhere to go, somewhere to live, and a parent who's on board with the idea. Every unhappy version of this we hear about traces back to a gift that nobody had been warned about.
You don't have to give the game away. Four questions, none of which reveals what you've bought:
"How tall is she at the minute?" Sounds like ordinary grandparent conversation. Gets you the one number that decides everything.
"Have they got anywhere to ride a bike at the moment?" A flat with a shared drive is a scooter household. A garden or a bit of land is a dirt bike household. This question changes which product you buy, so it's worth asking first rather than last.
"Is there room in the shed?" Tells you whether a folding scooter is the kinder choice than a bike that needs floor space all winter.
"Are they allowed something with a motor?" Some parents have a view on this. Far better to find out in November.
If you genuinely can't ask without ruining it, ask the other parent, or an older sibling. Someone in that house will happily keep a secret and answer a question about a shed.
Sizing a child you don't live with
Age will get you close. Height gets you right, and the two part company quickly — there's a good six inches between the tallest and shortest seven-year-olds.
Three things worth knowing:
They've grown since you last saw them. If your mental picture is from the summer, add a few centimetres. Children put on roughly 5–6cm a year through this age range, and more in a growth spurt.
If you're between two sizes, go up — but only just. The bike they can still get their feet down on is the right one. A bike that's too big is frightening to ride and gets left alone; a bike that's slightly roomy gets ridden for another year.
Use the Fit Finder, or just ask us. The Fit Finder takes a height and shows you the child drawn to scale beside the bike. If you'd rather have a human do it, send us the height and we'll tell you straight — including if the answer is "wait a year", which we'd much rather say in November than process as a return in January.
For which model suits which age, Christmas Gift Ideas by Age runs through the whole ladder.
Where should it be delivered?
This catches people out more than anything else on this page, because the obvious answer is usually the wrong one.
To the parents' house, not yours — if you're seeing them on Christmas Day. A dirt bike boxed up is 13–16kg and bike-shaped. Getting it into a car boot on Christmas morning, unseen, is a worse problem than it sounds.
To you — if you're not travelling, or if the parents can't hide it. Then you're posting it on later, which means a second lot of packaging and a second lot of handling.
Either way, tell the parents a box is coming and roughly when. A large unexplained delivery arriving in December is exactly the kind of thing an eight-year-old notices and asks about.
Stock sits in our own UK warehouse and goes out on 1–2 working day delivery, so you're not waiting weeks. What does run out in December is a specific colour — pink and blue go first, and we can't conjure one up on demand. If the child has a colour in mind, order in November.
Who's doing the fifteen minutes?
Every bike needs a small amount of setup — usually the front wheel and the handlebars, with the tools in the box. Five minutes on the smaller bikes, about fifteen on the biggest. The scooters need less; the S7 Pro needs none at all.
The question is who does it, and when. If it's the parents, on Christmas Eve, after a long day, they will thank you for warning them. There are step-by-step setup videos for every model — worth sending the link along with the news that a box is coming.
And the thing that actually ruins Christmas morning isn't assembly, it's charge. Nothing ships fully charged and a full charge takes around four hours. Someone needs to plug it in on the 24th. From the Box to the First Ride covers the whole evening.
Buy the helmet too
If you're buying the bike, buy the helmet. Leaving it to the parents means there's a day — maybe a week — where a child has a new bike and no helmet, and you can guess how that goes.
Helmet sizing is a head measurement, which is one more thing to ask for, but it's the same phone call. Our size guide explains how to take it, and a parent can do it with a tape measure in ten seconds.
Wrap it separately and have them give it first. It's a small thing that sets the habit on day one.
Bike or scooter?
From a distance, the honest rule is about space rather than age.
A scooter needs a patio, a path or a driveway, folds away into a cupboard and suits a terrace or a flat. A dirt bike wants a garden, a field or somewhere to go, and takes up proper room.
If the answer to "have they got anywhere to ride a bike?" was hesitant, buy the scooter. It's the one that fits a normal house, and a present that gets used beats a present that impresses for ten minutes.
The legal position is the same for both, by the way: private land with the landowner's permission, not roads or pavements. Their own garden covers it. Where Can Kids Legally Ride has the detail if the parents ask.
Frequently asked questions
What if I get the size wrong?
Get in touch before it's been ridden outside and we'll sort it. Ask whoever's keeping it to hang onto the box — it makes the whole thing simpler.
Is it too big a present?
That's a family question rather than one we can answer. What we'd say is that the thing most likely to cause friction isn't the price, it's the surprise — a parent who knew it was coming is almost never the one who minds.
They've already got a bike. What then?
A helmet they'll actually wear, goggles, or pads. All useful, all under the price of a bike, and none of it needs a measurement you haven't got — except the helmet, which needs a head measurement.
What if they live somewhere with no garden at all?
Then it's a scooter, or it's something else entirely. We'd rather tell you that than sell you a bike that lives in a hallway.
The bottom line
Make the phone call. Get the height, find out where they'd ride it, warn someone that a box is coming, and buy the helmet at the same time.
Do that and you've removed every way this goes wrong, and you still get the bit you wanted — a child coming round the corner of the house on something they didn't know they were getting.
Kubbi supplies electric bikes and scooters to over 15,000 UK families. Everything ships from our own UK warehouse with a 12-month warranty and spare parts held in stock.