Ferrets are very intelligent creatures with exceptional problem solving skills. They absolutely like to play and appreciate being challenged with new scenarios. These personality features make toys a necessity for ferrets to make sure they do not get bored. They will discover their own source of amusement, such as eating their hammock or digging up a potted plant in case you do not give a ferret something to do.
Toys will keep them out of trouble with the items in your household that you would rather NOT be a ferret toy and are a tremendous healthy activity for ferrets.