Feravox has a Kids mode. It simplifies the questions and the facts for younger readers, and it removes everything an adult app has that a child should not meet on their own: no ads, no comments, no chat, no direct messages and no links out of the app. Parents turn it on in Settings and it stays on.
A free wildlife app: 4,400+ species with real recorded sounds, 11 nature games and a free Daily 5, 1v1 quiz duels, conservation wins, and a safe Kids mode.
The Daily 5 is free. The full game library is part of Feravox Premium.