They look like this: https://commons.wikimedia.org/wiki/File:Wuppertal,_Kinderspielplatz_N%C3%BCtzenberg_-_Reitbahn,_Info-Schild.jpg.
The only difference: Instead of “NÜTZENBERG/EHEM. REITBAHN” will be written “MILCHSTRASSE" (i.e. Milky Road) due to its location there.
The text is almost entirely technical in nature: address of the mayor, where do I report vandalism, etc. The most important information: only for children up to 14 years old. But that’s exactly what “Kinderspielplatz” (children’s playground) means. Therefore, in my opinion, a close-up of the signs is not important, sorry.