Children cost their parents a six-figure sum until they come of age. According to the Cologne Institute for Retail Research, parents pay around ten billion euros a year for pregnancy tests, children's furniture, clothing, food, care products and toys.

What can't you do without, besides your family of course? What was your biggest mistake? And which product for young parents should finally come onto the market? Feel free to write to me at familie@spiegel.de! My reading tips: Do you only understand train station?