Peas are a great idea! I will be moving mine to the mansion soon after I evict them from the apartment/shed. The mansion is almost done with renovations!
I was going to take their current bed, a 5' pool and simply move it into the mansion. I will use peas to entice them now.
Mine do the same thing, they watch the chickens parade in and find various perches either on top of the cage or inside where I put perches. I used a very rough ramp with little steps (kinda of like that book Ping when I was a kid) but now I have a baby step and that is it. Some are smart enough to realize that makes it easier to hop into the pool and other scramble over the side, or fly in. Once someone started to lay an egg every day I added a big rubbermaid container laying on it's side (in the hopes that the egg will be laid there and not trampled on, but they lay whereever anyway) and they wanted NOTHING to do with the pool with that THING in there. So it took me and one kid to funnel them into the apartment, here we are a little over a week later and I am still funneling and picking up and placing ducks..at least I can funnel alone now.
Yup, I am trained well.LOL. I will try peas tonight.