A picnic table (or old, cheap, easy to hose off, plastic card table) can offer them 'king/queen of the hill' games or a place to get out of the sun or rain or even a way to cover a feeding station for them.
Shucked raw corn on the cob is a huge favorite toy/treat for my flock, but be advised that this is like feeding chickens cotton candy, it has NO nutritional value to speak of, so use sparingly.
A head of lettuce or broccoli, the darker green it is, the healthier it is (but still reduces their overall protein), use sparingly.
A few rocks/blocks in the run that you can flip over weekly will offer hours of insect foraging for your birds, highly entertaining for you and them, with the added benefit of free and healthy protein.
Shucked raw corn on the cob is a huge favorite toy/treat for my flock, but be advised that this is like feeding chickens cotton candy, it has NO nutritional value to speak of, so use sparingly.
A head of lettuce or broccoli, the darker green it is, the healthier it is (but still reduces their overall protein), use sparingly.
A few rocks/blocks in the run that you can flip over weekly will offer hours of insect foraging for your birds, highly entertaining for you and them, with the added benefit of free and healthy protein.