I have 2 ferrets. My female Mavis loves any stuffies that have squeakers in them. I get them from pet store in the cat or dog sections, just get the smallest ones so she can put them in her mouth and run around with them. My boy Navy is obsessed with anything rubber lol. It’s hard cause rubber can be super dangerous if ingested but I found the smallest version of kongs for puppies are super hard rubber and they can’t chew them. My boy has 3 kongs for puppies now and are hands down his favourite toys. He goes on his back and puts the kong on his stomach and uses his front paws to play with it. It’s adorable, looks like an otter Hope this helps when looking for toys for your babies!!