Baby Walz on there is the one I've used the most for general "equipment" / clothing type of things. They also have a great brochure which you can request for browsing through. http://www.baby-walz.com/
Seriously though depending on what you're looking for a google will pull up many Swiss baby stuff sites.
Personally I think babybutt has the best choice, if you can get past the name! A voucher from there may also then be valid for kinderbutt which is the shop for older children (but you would have to check.)
This user would like to thank Pepper for this useful post: