A large, solid based wheel is essential for them to exercise in and they will also enjoy a dust bath.
A large parrot or ferret cage is ideal for Degus, although care must be taken with the wire floors. Pet Degus can develop a painful condition called bumblefoot as a result of wire floors; floor can be covered these with cardboard or similar material to prevent bumblefoot. Wooden ledges, hammocks, tubes and ropes make good climbing opportunities and enrichment. A large wooden nesting box should be given, with pet-safe bedding or stuffed with hay. You can also provide branches from trees providing you have taken care to check the wood is safe for rodents.