This is the 10155th most frequent Spanish word.
chiquita
"Chiquita" means "little girl" or "tiny" (feminine form).
Here, 'chiquita' describes a young, small girl, showing affection or endearment.
La niña chiquita juega en el parque.
The little girl plays in the park.
In this context, 'chiquita' takes its literal meaning, to refer to the small size of the backpack.
Esa mochila es chiquita pero muy útil.
That backpack is small but very useful.
The term 'chiquita' is used here to express the small size of the dollhouse, highlighting its diminutive nature.