Favorite children's clothing stores?

Hi! We'll be visiting Berlin this December with our 9 month old. We're going to be on our way back from a wedding in South Africa where it will be summertime, so our thought is we might take the opportunity to purchase some cute winter clothes rather than overpack for two hemispheres.

Would love to hear any boutiques people have to recommend - European brands tend to be really beautiful and fun so would love anything local!

Also, if folks have baby-friendly activities they'd like to share, super open to those as well. So far our main plans are Christmas Markets and some museums :)