After a long search last year, I found a supplier of rattles and squeakers for baby toys but a nice jingly bell eluded me. Cat toys are an option, but not exactly what I was looking for with regard to price and quantity. Eventually I had a light bulb moment and decided I could make my own. I'm all set with 28 bells at a price of about 28 cents per bell. For all you toymakers, here is what I did.
What you'll need:
30 mm bells. I bought 28 at Hobby Lobby for $5.99
13 mm bells. A package of 64 is about $3.30 at discount stores
A standard screwdriver
Firmly hold one of the large bells in your hand. With the screwdriver gently and carefully pry up the "petals." You might be more comfortable putting the bell on the table, inserting the screwdriver tip into the bell, and pressing down on a petal to straighten it. Or use a pair of needlenose pliers to pry the petals out.
Being careful not to remove the "ringer" part of the bigger bell, insert the smaller bell into the bigger bell.
Then press the "petals" back down to enclose the small bell.
Insert the bell into your toy (surrounded by stuffing) and voila! A toy with a pleasant-sounding jingle.