Here are some toys I made. I only put ones that are not on other websites like dapper rat ( at least I dont think they are lol). Some I came up with others I did not.
Heres a tunnel and climbing toy. I used cardboard tubes that I got from a carpet store and cardbaord that I stripped the outer layer off.
Shelf thingy. Its just made from toilet paper/paper towel tubes, cardboard and hot glue.
This is made form wood and hot glue
This is made from toilet paper tubes, cardboard, hot glue and rope.
Some balance toys. I put these horizontally in the cage. One is just a piece of wood and the other is a tube from wrapping paper.
Some climbing toys. One is made form a paper towel tube and rope. One is made from a peice of wood and rope. The otehr is toilet paper tube and fleece.
Here are instructionshttp://www.fancy-rats.co.uk/community/viewtopic.php?f=19&t=142593
Ladders. One is made from dowels and hot glue ( you could just buy a bird ladder. I just had some dowels lying around and wanted to make something). The other is made from rope and another toy that they didnt use. You could just use sticks.
Toilet paper tube toys. They like to chew up the one thats fanned out. The others are food toys.
Bridges. Ones made from toilet paper tubes, rope, cardboard and hot glue. The other from toilet paper tubes and yarn.
Hanging toys. These are all food toys. 2 are made from rope and egg cartons.
Heres how to make the cube onehttp://www.origami-instructions.com/easy-origami-cube.html