nah a normal nappy wont work. As Grub said, they just get very very full and heavy and will proably just fall off and wont do much for holding in poo lol. Also as Grub said, you can buy cloth ones. I got DD's first one from Kmart for about $5 (though that was 2 years go) and it was size 000. You can get very little bathers, you just have to look around. Even try Ebay. A singlet and boardies would do ofcourse, I just dont know how happy she will be being in a wet singlet (just speaking from personal experience).