I wanted to be better acquainted with world geography, like us states or countries in Africa. So I build https://popotopo.com (well I say "I" but you know..)
Not really new but options that existed look like 1999
Seems like I'm a bit more "loose" with our 3yr old. 10 minutes of iPad every night before going upstairs and reading to her.
We attended a seminar about kids and screentime, an interesting fact was that apparently ipad/tv or a book has the same effect, not focussing on further away things is bad for the eyes.