booster seat

US /ˈbuː.stər ˌsiːt/
UK /ˈbuː.stər ˌsiːt/
"booster seat" picture
1.

seggiolino rialzato, rialzo

a seat that is placed on an ordinary chair to make a child high enough to sit comfortably at a table, or a seat for a child in a car that raises them to the correct height for the seatbelt

:
We need to buy a new booster seat for our growing child.
Dobbiamo comprare un nuovo seggiolino rialzato per il nostro bambino che cresce.
Always make sure the booster seat is properly installed in the car.
Assicurati sempre che il seggiolino rialzato sia installato correttamente in macchina.