Is there a certian age a kitten needs to be before being given catnip or catnip toys? Marlee is finally doing better, but she doesnt seem to be interested in any of the toys I bought for her. (1 springy door hanger, with feathers and stuff on the end; 1 fur ball on a string for her to chase; a little tennis ball; a crinkly sound making kitty; and a stationary scratch circle with a spring in the middle to hold a bell and ball to play with.) She seems to like playing with the ends of my pens, any cords (which I know is not good for her, but I'm having trouble stopping it) and sometimes wadded up paper. I haven't tried catnip yet, b/c I wasnt sure if she was too young. She is around 10-12 weeks. Anyone know about catnip, or have any suggestions for some toys?