There is a lot of different ways to entertain the birds. I have a grass catcher and when I mow with it I collect the grass and put it in their pens. They love to scratch through the grass clippings. You can also use leaves. I also now and then put flock blocks in their pens which they love to...
At 6 months old they should be ready to lay but some breeds may take longer. Maybe they have found a hidden spot to lay their eggs. It has happened to me before. Good luck...