Hey whatever you create to entertain kitty, safety must always come first. So as cute as it might be, don't buy a cat toy that has small parts that your cat can chew off and swallow. If it's something you just can't pass up, then remove the small parts. Kitty won't miss it. Also, it is unwise to leave kitty alone with a string toy because he can swallow the string and it can cause great harm, then you'll have to take fluffy to the vet. Not fun.
Regards,
Shaun
Regards,
Shaun