for phone apps i typically do drawing apps or coloring, the 5 and under section is great for this because they have a bunch of simple ones. i get some tummy time and ill try and use my other hand to draw so its more babyish and i go over the lines.
for video games ill always have a special place for pokemon. but my guilty pleasure is "evolution worlds" for being my favorite genre JRPG and being too easy that even a baby could beat just mashing "A" and its got that little boy charm to it.
next fav would probably be chocobo racing or crash bandicoot.
but when i was little it was sonic, lion king, pokemon, computer math + search games, donkey kong 64, mario, banjo kazooie, and spyro.
some more recent ones i love are
a hat in time
ori and the blind forest/will of the wisps
supers lucky tail
garden paws summer festival
seasons after fall.
hope this helps as a starter list!