Ferrets can easily navigate stairs
Stairs go up and come down as well.
Stairs, you go up you go down but the stairs never move.
the stairs
The basement or the root cellar are often found when you go down stairs.
The opposite is descend (go down the stairs).
go to the jungle and there's some stairs, go down the stairs and go in the door on the right!
They probably can but, I don't think its a good idea to let them go down stairs because they might fall.
The answer to this riddle is "a staircase". Of course the staircase does not actually move up and down, but when you refer to a staircase directionally, you are either going "up the stairs" or "down the stairs". Its function in and of itself is to "go" up and down.
walk down them
stairs lol
Yes, they can.
go to route 1 there will be a section of water then go the currents which will be to far left then there will be an island go up the stairs trough the grass then go down the stairs to the left then there will be an area of sand now there will be a tiny set of stairs go up then then there will be a set of stairs to the right go down then yet again there will be stairs to the right then go to the water. go to current that is shortest and then you'll be at the p2 laboratory.