Here’s a craft to help get your cat thinking.
Get a long cardboard tube like the one that Christmas paper is wrapped around when you buy some. Tape up both ends and punch a few holes in the side of the tube.
Make the holes big enough so you can put their favorite dry treats into the tube. That also lets the treats come out when your cat pushes the tube around.
Color the tube with felt markers and tie a small bell to one end.