Yes, I kept and bred them once. They have to be kept in not too dry soil and well fed. Then you'll induce breeding by putting them in a rain chamber with shallow water (about 5 inches deep in the deepest point). Females must be quite overfed prior to introduce them into the rain chamber. tadpoles are both bottom feeders and suspension feeders. Use very fine fish powder to feed them.
Hope it helps even after this long period.