This is the 348th most frequent Italian word.
piccoli
"Piccoli" means "small" or "little" (plural) in English.
In this sentence, 'piccoli' acts as an adjective describing the subject, 'gattini', meaning 'small' or 'young'.
I piccoli gattini giocano nel giardino.
The small kittens play in the garden.
Here, 'piccoli' describes 'miglioramenti', emphasizing slight or minor improvements.
Abbiamo visto dei piccoli miglioramenti nei risultati dell'esperimento.
We saw some small improvements in the experiment results.
In this instance, 'piccoli' qualifies 'bambini', indicating 'young' or 'small' in age.