Here is a place for kids to learn how to navigate on roads on bike (read signs). 
The place can be somewhat seen on Street View https://www.google.pl/maps/place/Kobierzy%C5%84ska+50,+30-363+Krak%C3%B3w/@50.0295798,19.9155322,3a,18.2y,57.36h,88.04t/data=!3m4!1e1!3m2!1shk1PD-p3xtzWeCQaSueoZA!2e0!4m2!3m1!1s0x47165c9b9c06bb3b:0xc07b4e4063d8b3f5?hl=en