They are spoilt! I recommend choosing a food/bathroom area (they are the same thing after all!) and I chose the most accessible area for cleaning plus . I change their cage around every big clean to make it interesting, but my Bella always rearranges it all like a house wife anyway.
Oh and my girls love their bird mirror (vain little things!) and they LOVE bells. Anything with a bell on they love to ring. Cardboard boxes they like more than any house I've found, and they like the wicker tube I have they prefer to my cardboard one but the poos get stuck in the wicker haha. Just a case of finding out what they like/want, they will DEFINITELY let you know haha.
Oh and also might be worth getting some Lice 'n' Easy shampoo as I had to get some for the girls as they ended up with hay lice from, well, their hay lol. Idk what breed of piggy you have but a soft brush is definitely a good buy too, my girls enjoy it (although they are just short haired) and it helps get the loose hair off them.