Her narrow taste is useful information, not a limitation
A cat who ignores feather wands and plush mice but comes running for a crinkle ball is telling you how she hunts: by ear first. Rustling and crinkling mimic the sound of prey moving through dry leaves and grass, and a bell's roll gives her moving sound to track around furniture. Rather than trying to broaden her tastes for its own sake, build richer games inside the channel she already trusts. A sound-led cat often plays longer and more confidently than she ever would with silent toys, because every bat produces the feedback she is listening for.
Start by sorting what you own by sound: gather the crinkle balls, foil mice, rustle tunnel and bell balls, and retire silent toys for now. A smaller kit played in more ways suits a specialist best.
Change the game, keep the soundtrack
Novelty for this cat lives in movement and location. Drag a crinkle toy slowly under a sheet of packing paper so the rustle travels and she stalks the sound, not the sight. Toss a crinkle ball so it skitters and crackles across a hard floor, then go quiet and let her locate the last sound before pouncing. Roll a bell ball gently past a half-open door while she waits on the other side, turning a hallway into an ambush point. Slide a rustling toy inside a paper bag lying on its side and let her reach in after the noise, supervising so she never gets tangled if she dives in headfirst.
Hide-and-seek works especially well here. While she is out of the room, place two or three noisy toys half-hidden — one under paper, one in a box, one behind a cushion with its crinkle edge exposed — and let her work the room by ear. Giving a toy a small squeeze as you leave can set the first sound in her memory and start the hunt with confidence.
Make and refresh simple sound toys safely
Some of her best toys can be homemade from what is already in the house: a large ball of firmly scrunched brown paper, a cardboard tube with its ends folded in around a dry treat so it rattles and rustles as it rolls, or a paper grocery bag with the handles removed. Inspect every homemade and shop-bought sound toy before each session. Crinkle film tears, bell casings open and paper toys soften with chewing; discard anything shedding small pieces, and never leave bell toys or crinkle film with her unsupervised, since a cat who loves mouthing noisy toys is exactly the cat who may work a piece loose.
Refresh the kit by rotation: put half the noisy toys away for several days, then swap them back — a crinkle ball missing for a week often gets a full hunting reception on its return.
Use sound to widen the rest of her day
Her ear-led play style is also a tool for confidence. A shy cat who will not cross an open room for a silent toy will often cross it following a crinkle drag, so use sound games to rehearse moving through spaces she avoids. Puzzle feeders that rustle as they are batted can convert her dinner into the same listening hunt. Keep volume in proportion, though: constant loud rustling in a small flat can overstimulate, so give noisy play clear sessions and quiet rest between them, and stop if her tail starts lashing or her bats turn into biting the hand holding the toy.
Using KinsLe Care Teams, you can keep a running note in her play duties of the exact sounds and setups she chose — paper-drag, doorway bell ambush, bag rustle — with each session marked complete, so whoever plays with her next builds on her proven favourites.