Questions & Answers about Dziecko lubi niespodzianki.
Dziecko is one of those Polish nouns that is grammatically neuter, even though it refers to a person who can be male or female.
This is normal in Polish: some words for young beings are neuter, for example dziecko (child).
That matters for agreement in some contexts:
- małe dziecko = small child
- dziecko było zmęczone = the child was tired
In your sentence, though, you do not see a special neuter verb ending, because the present-tense form lubi is simply the normal 3rd person singular form.
Lubi is the 3rd person singular present form of the verb lubić (to like).
The subject is dziecko, which is singular, so the verb must also be singular:
- ja lubię = I like
- ty lubisz = you like
- on / ona / ono lubi = he / she / it likes
So dziecko lubi is the correct match: singular subject + singular verb.