Dzieci jedzą lody w parku, a babcia kroi gruszkę i śliwkę na małe kawałki.

Dzieci means children, while dziecko means child.

In this sentence, the verb jedzą means they are eating / eat, so the subject has to be plural. That is why Polish uses dzieci.

A useful thing to remember is that dzieci is an irregular plural:

• dziecko = child
• dzieci = children

So Dzieci jedzą... = The children are eating...

Jedzą is the 3rd person plural form of the verb jeść (to eat).

Because the subject is dzieci (children), the verb must also be plural:

• ja jem = I eat
• ty jesz = you eat
• on/ona je = he/she eats
• my jemy = we eat
• wy jecie = you (plural) eat
• oni/one jedzą = they eat

So:

• Dzieci jedzą lody = The children are eating ice cream

In Polish, lody is normally a plural noun even when English uses singular ice cream.

So Polish says:

• lody = ice cream / ice creams

Grammatically, it behaves like a plural noun:

• Lubię lody. = I like ice cream.
• Dzieci jedzą lody. = The children are eating ice cream.

This is one of those places where Polish and English organize the idea differently. English treats ice cream as usually uncountable, but Polish usually uses plural lody.

Because w here means in, and when Polish expresses a fixed location, w usually requires the locative case.

The noun park changes like this:

• park = nominative
• w parku = in the park

So:

• w parku = in the park

This is a very common pattern:

• w domu = in the house
• w sklepie = in the shop
• w ogrodzie = in the garden

If the meaning were motion into the park, Polish would often use a different structure, for example do parku.

They both can translate as and, but they are not used in exactly the same way.

In the sentence:

• ..., a babcia kroi...
• gruszkę i śliwkę...

Here:

• a connects two clauses and often suggests a mild contrast or a shift of attention: the children are doing one thing, and grandma is doing another
• i simply joins two nouns: a pear and a plum

So:

• a = and / while / whereas, depending on context
• i = and

In this sentence, a feels very natural because it moves from one little scene to another:

• The children are eating ice cream in the park, and meanwhile grandma is cutting...

This is about case.

• Babcia is the subject, so it stays in the nominative
• Gruszkę and śliwkę are direct objects, so they take the accusative

For feminine nouns ending in -a, the accusative singular usually changes to -ę:

• babcia → babcię
• gruszka → gruszkę
• śliwka → śliwkę

In this sentence:

• babcia = grandma (subject, nominative)
• kroi gruszkę i śliwkę = is cutting a pear and a plum (objects, accusative)

So the endings show what role each noun plays in the sentence.

Kroi is the 3rd person singular form of kroić (to cut / slice).

Because the subject is babcia (grandma), which is singular, the verb must also be singular:

• ja kroję = I cut
• ty kroisz = you cut
• on/ona kroi = he/she cuts
• my kroimy = we cut
• wy kroicie = you (plural) cut
• oni/one kroją = they cut

So:

• babcia kroi = grandma is cutting / cuts

Because the sentence is talking about one pear and one plum.

Polish marks each noun individually:

• gruszkę = a pear
• śliwkę = a plum

Even though there are two objects together, each one is still singular. They are simply connected by i:

• gruszkę i śliwkę = a pear and a plum

If the sentence meant plural fruits, you would get different forms, for example:

• gruszki i śliwki = pears and plums

Na małe kawałki literally means into small pieces.

This is a very common Polish pattern:

• kroić coś na kawałki = to cut something into pieces
• podzielić coś na części = to divide something into parts

Here na shows the result of the action: after cutting, the pear and plum become small pieces.

Also notice that małe kawałki is in the accusative plural, because na in this kind of result-expression takes the accusative:

• na małe kawałki = into small pieces

So the whole phrase:

• kroi gruszkę i śliwkę na małe kawałki means
• cuts a pear and a plum into small pieces

Kroić is imperfective, and pokroić is perfective.

In a descriptive sentence like this one, Polish often uses the imperfective because it presents the action as ongoing, in progress, or simply as part of the scene:

• babcia kroi = grandma is cutting / grandma cuts

If you used pokroi, it would sound more like a completed future action:

• babcia pokroi gruszkę i śliwkę = grandma will cut up the pear and the plum

So kroi fits well because the sentence is painting a picture of what is happening.

Polish word order is fairly flexible, but the version in the sentence is the most neutral and natural for many contexts.

Neutral order:

• Dzieci jedzą lody w parku, a babcia kroi gruszkę i śliwkę na małe kawałki.

You could move things around for emphasis, for example:

• W parku dzieci jedzą lody... = In the park, the children are eating ice cream...
• Babcia kroi na małe kawałki gruszkę i śliwkę. = stronger focus on the result into small pieces

So yes, the order can change, but the original version is a very normal default sentence.

In Polish, endings often tell you the grammatical role.

In this sentence:

• dzieci is the subject of jedzą
• babcia is the subject of kroi
• gruszkę and śliwkę are objects because of their accusative endings -ę
• w parku shows location
• na małe kawałki shows the result of cutting

So even if the word order changed, the endings would still help you identify the structure.

That is one of the key ideas in Polish: English depends heavily on word order, but Polish often depends more on case endings and verb forms.

It is made of two coordinated clauses:

1. Dzieci jedzą lody w parku

   • Dzieci = subject
   • jedzą = verb
   • lody = object
   • w parku = place

2. a babcia kroi gruszkę i śliwkę na małe kawałki

   • a = connector between the two clauses
   • babcia = subject
   • kroi = verb
   • gruszkę i śliwkę = direct objects
   • na małe kawałki = result phrase

So the sentence structure is basically:

[Children] [eat] [ice cream] [in the park], and [grandma] [cuts] [a pear and a plum] [into small pieces].