NIC cubes are small, inexpensive cubes that are often used as cages for small rabbits that do not jump out, or they are used to build rabbit condos. The acronym "NIC" stands for neat idea cubes.
Multi-level rabbit condos made from NIC cubes give bunnies the space they need while minimizing the amount of floor space that is needed to provide the animals with adequate housing. The cubes are typically constructed of wire, so the floor portion of the cage must be covered to protect the rabbit's feet. Plexi-glass, a piece of plywood or carpet should be used to do this, although carpet must be removed immediately if the rabbits begin to chew on it to prevent intestinal blockage.