Some birds keep on nursing their young long after we think the lazy children are large enough to be looking out for themselves. It would be no better than they deserve if they had to go hungry sometimes. We think they often must get very hungry before they have learned to work for their board. This is all right, for if the parents kept on supporting them, what useless creatures they would be! We shall tell you after a while about our bird's restaurant. We have seen the young birds follow their mother to the table at this restaurant and stand coaxing for the crumbs. At first the mocking-bird mother picks up the food and puts it in the young bird's mouth, and then she flies away. She has given it only a little, just to show the little bird where the food is and how to pick it up himself. There he will stand, looking at the cookie crumbs and teasing as loud as he can, but the mother will not come back. She sits in a tree near by watching to see how her bird child learns his first lesson at helping himself. After a while, the young bird gets very hungry and begins pecking for the crumbs. At first he makes very awkward attempts at grabbing a crumb, but he succeeds at last and swallows the rest of his breakfast. We laugh, sitting in the shade watching him, and we think his mother is laughing too, in the tree above. Those birds that do not nurse their young with liquid food are supposed to give them water as well as food, by bringing it to them in their beaks, though we have not seen them do so. Probably the babies are fed on soft worms and fruits until they have cut their first teeth. How can the little things eat hard seeds and bones before they have any teeth? Does it make you smile and wonder when we speak of baby birds cutting their teeth? Don't you suppose birds have teeth? Of course they have. Every bird has a set of false teeth working out of sight. Birds never have the toothache, and they do not have to be brave and hold still while somebody pulls their teeth out. They can have a new set of teeth as often as they need them, without paying a good price to the dentist. Look along the path and you will see these teeth, lying as thick as hail in some places. Little sharp stones, coarse gravel, and fine sand,--these are the bird's teeth. When a bird picks them up, he swallows them, and they go, without any trouble, right where they belong, down to a kind of pouch or pocket called the gizzard. This pocket is lined with very tough muscles. These muscles or rings look something like a fluting-iron or washboard, and as they move they set the teeth or little stones to rolling against the food in such a way that it is soon ground into bits, or rather into paste. It takes a baby bird a long time to learn to pick up anything with its bill. It will peck and peck at the food without being able to touch it, as we have seen many birds do when brought up in a cage, and as the little mocking-birds do at the garden table.