Outdoor time, Pinterest activities, also we would do a ton of virtual trips to museums or story time at the library online. Every day we would have the same schedule but different activities. So we would go outside but do chalk, ride a scooter, take a walk etc. Craft time, watch a movie (this was during rest time) do a virtual tour. Read books. That are so many ideas on Pinterest!
Loooooots of outside time if possible. Walks. We used to look at different trees and flowers and grass. I was at home right after my son turned 3 and it was pretty hard to keep him constantly occupied but he really likes baking even though I super sick at it. Coloring, paint, we even made slime (do not recommend) but also they thrive on routine so I tried to stick to the same one every day. You think itβs boring for them but they really like knowing what happens next.