Børnene løber gennem sandet til badebroen, så snart solen kommer frem.

Børnene means the children. Danish often adds a definite ending directly to the noun instead of using a separate word like English the.

• et barn = a child
• børn = children
• børnene = the children

This is also a good example of an irregular noun:

• singular: barn
• plural: børn
• definite plural: børnene

So børnene løber means the children are running / the children run.

Løber is the present tense of at løbe = to run.

Danish present tense is usually formed by adding -r to the infinitive:

• at løbe = to run
• løber = run / is running

In this sentence, løber can translate naturally as either:

• run
• are running

Danish present tense often covers both ideas.

It can feel a bit like both from an English point of view. Danish often uses the present tense for:

• things happening now
• habitual actions
• future events that are expected or predictable

So Børnene løber gennem sandet til badebroen, så snart solen kommer frem can describe a repeated pattern or a very natural future event: whenever/as soon as the sun appears, the children run down to the bathing pier.

This is very normal in Danish.

Gennem means through. It gives the idea that the children are moving across or through the sandy area.

• gennem sandet = through the sand
• på sandet = on the sand

So gennem sandet focuses more on movement across the beach area, not just location.

Also, sandet is the definite form of sand:

• sand = sand
• sandet = the sand

In Danish, this can sound natural even where English might simply say through the sand or just through the sand on the beach.

Because Danish often uses the definite form where English might be less strict about it.

Here:

• sand = sand
• sandet = the sand

Gennem sandet suggests a specific stretch of sand that is part of the scene, such as the beach sand nearby. Even if English might sometimes say just through sand in a more abstract sense, Danish usually prefers the definite form in a concrete situation like this.

Badebroen is the bathing pier / swim pier / jetty used for swimming.

It is a compound noun:

• bade- = bathing / swimming
• bro = bridge, pier, jetty
• badebro = bathing pier
• badebroen = the bathing pier

Compound nouns are very common in Danish, and the definite ending goes on the last part:

• en badebro = a bathing pier
• badebroen = the bathing pier

Til means to or toward, and it is used for movement to a destination.

So:

• løber til badebroen = run to the bathing pier

This is different from a location word like på:

• på badebroen = on the bathing pier

In the sentence, the children are moving toward the pier, so til is the natural choice.

Så snart means as soon as.

It introduces a subordinate clause:

• så snart solen kommer frem = as soon as the sun comes out

This phrase connects the two ideas:

• main clause: Børnene løber gennem sandet til badebroen
• subordinate clause: så snart solen kommer frem

So the whole sentence means that the children run to the bathing pier at the moment the sun appears.

Because så snart introduces a subordinate clause, and in Danish subordinate clauses the word order is usually subject + verb.

So you get:

• så snart solen kommer frem

not:

• så snart kommer solen frem

The second version sounds wrong in standard Danish.

This is an important difference from main clauses in Danish, where the verb often comes in second position.

Compare:

• Main clause: Solen kommer frem.
• Subordinate clause: ... så snart solen kommer frem.

In both of these, solen comes before kommer, but in many other main-clause patterns Danish shows verb-second word order much more clearly.

Kommer frem literally means something like comes forward, but here it means comes out or appears.

With solen, it means the sun becomes visible, usually from behind clouds.

So:

• solen kommer frem = the sun comes out

This is a very natural Danish expression.

Because Danish normally uses a comma before a subordinate clause.

Here the subordinate clause begins with så snart, so the comma separates it from the main clause:

• Børnene løber gennem sandet til badebroen, så snart solen kommer frem.

This is standard Danish punctuation.

Solen is the normal definite form meaning the sun.

• en sol = a sun
• solen = the sun

Danish usually uses the definite ending directly on the noun. You only use den with a noun in special structures, especially when there is an adjective:

• solen = the sun
• den varme sol = the warm sun

So in this sentence, solen is exactly what you would expect.

Yes. That is one very natural reading.

Because the sentence uses present tense and describes a typical trigger event, it can mean something like:

• Whenever the sun comes out, the children run through the sand to the bathing pier.

So it does not have to describe only one single moment. It can also describe a repeated pattern or something characteristic.