* to think about blue almonds
To think about unimportant things. It also means daydreaming.
Note: An alternative translation is “to think about heavenly treats,” considering the words "blue" and "heaven" are closely related in Polish, and "almonds" historically has been used to refer to treats a broader sense.
"Tomek zawsze myśli o niebieskich migdałach podczas lekcji. Powinien się skupić!
"Tom always thinks about blue almonds during class. He should focus!"