I'm getting a Kindle Fire for my 2yo (yes the interface sucks, but it's what I'm used to for my older child). It will have very limited content so he can choose what he wants easily:

A keyboard / piano app

Pango Paper Color (which is delightful and he LOVES)

BBC iPlayer for CBeebies things he likes (Bluey, Hey Duggee, Sarah and Duck, Grace's Amazing Machines)

Baby Shark (because Baby Shark)

Just wondering if anyone has any other must-have apps for very tiny tots? He's into colours at the moment, obsessed with cars and vehicles, is starting to count (1 to 5-ish by rote), but I'm also looking for things that wouldn't cross my mind, so anything you rate. Please and thank you!

(I'm not looking for advice on screentime; we're happy with our approach.)