I made this a while ago - i just used a cheap breakfast tray (those ones with legs) for the base, and used wrapping paper and cardboard for everything else - vids of both hamsters in it! (not at the same time)
Darcy - (gives the camera a kiss)
YouTube - ‪Darcy - Russian dwarf hamster in maze/playground‬‏
Mufasa -
YouTube - ‪Mufasa - Russian dwarf hamster in her maze/playground‬‏