With the new restrictions, we have the limitations of 15 km . A Good way to find nice paths close to you is : the Komoot application.
I like it, because I can set the distance , the timing and I always find some small „thresholds“ close to your door.
In Nürnberg , in the erlestegen forest , you can find in the middle of the Forest some Sand Dunes.
Once you arrived there , you can organize with your children a game: children in one Team and adults in another Team. You neeed two walkie – talkie.
the game is consisting with the children that hide them self and the parents that following the indication of them; they are looking for them. It is really funny and in this way you will have the possibility to move a lot.