booster seat

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

Kindersitz, Sitzerhöhung

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.
Wir müssen einen neuen Kindersitz für unser wachsendes Kind kaufen.
Always make sure the booster seat is properly installed in the car.
Stellen Sie immer sicher, dass der Kindersitz richtig im Auto installiert ist.