This is the 3398th most frequent Dutch word.
liedjes
"Liedjes" means "songs" in English.
Here, 'liedjes' is used as the subject of the verb phrase 'die vrolijk zijn', meaning 'that are cheerful', to discuss a preference for a type of songs.
Ik hou van liedjes die vrolijk zijn.
I love songs that are cheerful.
In this sentence, 'liedjes' refers to the object of the verb 'leren' (learn) and is being used to indicate what is learned.
De kinderen leren nieuwe liedjes op school.
The children learn new songs at school.
Here, 'liedjes' indicates the songs sung during an occasion (past activity), functioning as the object of the activity 'zingen' (to sing).