For toys-
I find some of the best toys are the cheap diy toys. Toilet paper tubes and paper towel tubes make excellent tunnels! My robo boys absolutely love having a toilet paper roll or two to hide in, roll around and drag across their cage. Another great toy is a toilet paper tube puzzle ball. Just cut the roll into 5-6 rings, and then fit them around each other to form a ball (I'll include a picture to show you what I mean). You can stick your ham's favorite treats into the gaps for them to sniff and find, which acts as a boredom buster. My boys always love pushing the balls around the cage and taking the rings off to get to the treats inside!
Another great diy toy is a cardboard nesting box-
https://m.youtube.com/watch?v=6koO9ITLlXU
Key Lime will occasionally nap in it. Whenever he feels scared I guess it's a place of refuge for him. Lol!
Anyways that's my toy reccomendations! I'm sure there are other users on here who could offer you better recommendations though.