Rats are very intelligent animals and thus need interesting cages and toys to keep them stimulated. Even if you do not own any tools, know how to sew, or have much time to build anything fancy, there are still many simple and easy ways to.
Schnittmuster: Witziges Schlüsseltäschen nähen - mit Bullauge zum Befüllen
DIY pet bed hammock with picture tutorial Using: Polyester fleece stadium blankets from the thrift store for Polypropylene webbing from a belt strap cut into pieces. and 4 swivel clips from an old purse (they don& HAVE to match) cheap shower curtain hooks