Of course. AND it is a good recycling use, and LOADS of fun to ask for the empty toliet paper rolls at places, or from your friends. Heehee.
The male is actively breeding the females. Four of the females are getting very glossy and gaining weight, learning to rush about poking into everything. The last female has turned out to be blind(or nearly) and has a tumour under one little arm. Apparently she is quite old, but she rules over the others fairly well, seems to get around fine. So she will hang out and live the good life a while. All of them groom each other, and have stayed very busy taking those strips of phone book paper all over the tank.
OH!! For the ultimate in rattie heaven, put about half a dozen live crickets in one of those rolls, and pinch it shut. NOW you're talking rattie treat. They LOVE crickets. Chocolate for ratties.
Wolfy