Douglas dislikes toys generally. I have had good luck taking him to the store and letting him pick them himself. So far he has chosen only 2 things, a stuffed mouse that has a shiny blue scarf on and a stuffingless fox.
My ferrets are less discriminating, they are very fond of small soft things that squeak. I also took them to pick their own toys for a long time although now I can pick okay myself. My larger one likes bigger toy for wrestling. I'm sure a chi would like the same. The overall favorite are these in the tiniest size, Bode sucks on his and sleeps with them (we have every animal they make, the frog is Bode's christmas gift this year). You can also replace the squeakers!