Only eighteen, because we gave a dozen or so to a friend.
Adopting them as your own is the only logical thing to do when you find a bucket of water full of tadpoles behind an abandoned house. (Actually, I offered another alternative, one that involved dumping them in the creek. I was voted down by the rest of the family.)
Can someone please remind us what happens when eighteen tadpoles stop being tadpoles and start sprouting legs? Because based on the size of this little aquarium, we seem to have forgotten.