my cat sits next to her toy most of the day and keeps meowing?

i know what you're thinking, PLAY WITH HER!!!!!!!!. but that's the thing, no matter how much you play with her and her toy she just keeps meowing for more ( she only meows when someone walks past her.)

she does this to my mom most of the day and just sits in the kitchen next to her toy ( it's a fishing rod toy that has a little bit of string on it) when my mom leaves the house she turns her attention towards me and follows me around the house.

we have tried moving it to a different room but she ends up dragging it back in ( when she can't find it she goes frantic looking for it around the house meowing)

what do we do?, this has been going on for about 2 weeks now ever since we bought the toy for the cats ( we have 2 others) and she has never done this before with her previous toy ( most likely because the fishing rod toy needs a person to use)

she only leaves her toy when she goes to bed or eats ( sometimes she sleeps near the toy)

she's not protective of it when the other cats go near it

if it helps she's a 4 year old indoor cat ( she might be 5, i forget)