Mine are a home with me all day (4 and 2 plus a newborn) and we have a similar routine to the ones shared above :)
I have a rota of different things I like to do with them and weather permitting we always go out. My 4 year old has so discovered minecraft so I allow her to play a console, but take it from me do not let them play console games anywhere near bed time :O
We tend to do busy morning, post lunch relaxing and then quieter/sit down activities like crafts and baking when they start to get bored again. You can also vary it and don't have to do something super active every day, for example we have been to a big outdoor park and lake to feed the ducks yesterday so though we didn't get out in the wind and rain today I wont sweat it, we made animals out of duplo instead :)
Our quieter activities:
Card games (toddler style cards with games of pairs and snap)
Making things out of duplo together (diplo do little cards of stuff you can make with boxes/on their website)
All kinds of painting and crafts, finger painting, sticking and stamping, paper crafts, clay painting
Board games
Role playing games like cafes, vets
Dressing up (doesn't last as long as you would think though)
Den/fort building
Stories
Water play in the bath
Sensory style play with stuff like pasta, lentils, marbles, buttons etc and lots of containers and utensils to mess around with
Baking
Simply playing alongside them with their toys for a while
I don't structure their days too much or pack it with stuff to do, we do on average 2 or 3 organised activities a day and then the rest of the time is just pottering, playing independently and meal times/bed time.