Really like the coconut shells.
I don`t have a grill on my tank-style cage to hang one from as I don`t use my cage lid, but I would say these are fun for a hamster as long as they are hung low down for easy access. Your ramp/rope ladder looks okay at the height it`s at, but just to remind people not to use runged ladders or have any hanging house/toy too high up. The hamster is more likely to go into it if it`s easy to get into in the first place. x