"Succeeded by a hi-fi store it seems"
The place has gone or never existed. A user of Organic Maps application has reported that the POI was visible on the map (see snapshot date below), but was not found on the ground.
OSM snapshot date: 2025-05-11T16:17:16Z
POI name: Planet Happy Arnhem
POI types: shop-toys
#organicmaps android

Trinkbrunnen nicht aktiv...

via StreetComplete 61.1

Pflastersteine, nicht Asphalt (habe die Wege falsch interpretiert)

via StreetComplete 61.0

Hier steht eine Bank

via StreetComplete 61.1

Attached photo(s):
https://streetcomplete.app/p/284779.jpg

"Truderinger Festwiese" nicht eingezeichnet?

via StreetComplete 61.0

Attached photo(s):
https://streetcomplete.app/p/280962.jpg

Der Verein https://www.truderingerbuamfestring.de/festwoche/
nennt ihn "Truderinger Festplatz"

via StreetComplete 61.0

Unable to answer "What’s the name of this place?" – Kiosk – node/1337350710 via StreetComplete 61.1:

Umgebaut zu Wohnhaus (schon vor Jahren)

Dock kein Mülleimer, habe mich verguckt (andere Straßenseite aber schon).

via StreetComplete 61.1

Unable to answer "What type of shop is this?" – Flockdruck-Wesel Textildruck (Shop (Unspecified Type)) – node/3594182911 via StreetComplete 61.1:

Flockdruck existiert nicht mehr

Attached photo(s):
https://streetcomplete.app/p/284744.jpg

Unable to answer "Do you have to pay to park here?" – Hotel Restaurant Kaiserhof (Parking Lot) – way/566230723 via StreetComplete 61.1:

Nur für Gäste. Keine Parkuhren Schranken oder Zeitbegrenzungen.