Collector: me and inkmatas do battle practice every once in a while, she's actually gotten really good
Same with eggyhead but with his extreme durability I hit him harder than inkmatas
I generally mess around with certain forms of magic, as you know I experiment with inkstone although I'm still not very good at using it, other times I try to make powerful weapons, sometimes it works like with the sword of creation but other times I just make a fidget toy
As far as I know inkmatas generally does normal inkling stuff, turf war, shopping, etc, she also reads some of the history of her people and about her magic, she's found quite a few prophecies that line up with stuff that actually happened
Eggyhead just sits around, watches TV, and eats hot pockets. That's all I find him doing whenever I go to his house.