I have a ladder in the one on the left (his cage) and also a few others, including a cool toy I made from clean paint sticks that I bought, it isn't very easy to see from the pic, they are making good use of it. They do visit with each other and check to see if they both have the same thing in their food dishes, sometimes they put their heads together and peep, but the female will not let him preen her, he does try, then gets mad and nips at her. They also hang out on the cages and play with the lights on the air cleaner. They eat their eggs together every morning. If they don't get eggs they let me know they are not happy about it.
I have five smaller toys in the females cage, she stretches a lot more than the male, so I left her more space. I also made a huge ring that is wrapped with rope and has a perch, it now hangs from the ceiling from huge plastic links. The male will take water cracker off of it, that I wedge into the rope, but doesn't stay on it long, it's all an adjustment for them. I don't think they have ever had anything but Hartz type brand toys.. shudders. They love the new wooden toys that I bought and made for them, they love tearing them up. I do wonder if the female will ever be as happy as the male.