Dorling Kindersley game where you had to explore under the sea. I distinctly recall it starting with a bathtub (and a toothbrush for some reason) as well as other things like scuba diving with fish and exploring a lighthouse at the docks.
I've searched for hours on the internet and the closest thing I can find is: https://youtu.be/xmaR73miQe0?t=36 (I looked at the rest of the channel but couldn't find the game)
Thanks for any help or pointers in the meantime
Children's PC Game by DK early-mid 2000's
Children's PC Game by DK early-mid 2000's
That's all folks!
A list of submarine-themed games; maybe something matching?
https://www.mobygames.com/game-group/theme-submarine
https://www.mobygames.com/game-group/theme-submarine