where can I buy a child car seat booster in viena online

There are several online retailers where you can buy a child car seat booster in Vienna, Austria. Some popular options include:

1. Amazon Austria (www.amazon.at)
2. BabyOne (www.babyone.at)
3. Baby Walz (www.baby-walz.at)
4. Baby Markt (www.baby-markt.at)
5. Babyland Online (www.babyland-online.at)

You can visit their websites and search for "Kindersitz Booster" or "Kindersitzerhöhung" to find a suitable car seat booster for your child. Make sure to check the product details and customer reviews before making a purchase