Another one my ladies love is a plastic bottle (used, individual sized drink) with holes burned through with a wood burner. Then put in a bit of scratch grains and toss it into their run. Mine has four sides and they have to move it around with their feet to get the grains to come out. One of...
The thing mine like the most... by far... is a pot that's still filled with the soil and roots from last year's plants. I dump it out in their run and they peck away to their hearts content. I started growing vegetables in 5 gal buckets last year and the ladies loveeeee these turned over in...