Y'all are so lucky! Mine won't eat "guts" of anything - melons, squash, cucumbers, etc. Heck, they won't even eat the good parts. They do love pineapple, berries, grapes, apples & tomatoes. Wish they did eat my veg waste! Just keep in mind whenever you give "treats" you're diluting the macros of...
I mix what I call "candy" in a Ball Jar and they can hear me unscrew that jar a mile away! It consists of hulled sunflower seeds, sesame seeds, millet, flax seeds, pepitas. I give infrequently or when I need to bribe them!!