These murals are in fact paintings decorating a terrace wall at the city-farm de Kemphaan in Almere. You can have lunch or a drink here and sometimes there is a theater play to watch. That's what you see in the background, a tribune with children watching a musical performance. When there is no play, the tribune is hoisted up to the ceiling.
About the paintings I couldn't find any information, but it lightens up the terrace I think.
See for more Monday Murals here