What's the best pack to keep busy during quarantine?

Stuff packs won't keep you busy for very long, they normally include a gameplay item but there isn't much to do in terms of gameplay after you played around with that a few times.

I don't have Realm of Magic so I can only really recommend Jungle Adventure. It has a lot more to do, especially if you're into getting collectibles. If you're not into the treasure hunting or archeology aspect, you can still take your family on a nice vacation and discover Selvadorada traditions.