None. You should not be raising wild birds. They should be raised by their mother or left to be eaten by something else.
If you find a baby bird that appears injured or abandoned, try to locate its nest and place it back in the nest if possible. If the bird is injured, carefully place it in a small box lined with a towel and keep it warm and quiet. Contact a local wildlife rehabilitator or animal rescue organization for further assistance. Avoid feeding the bird or giving it water, as improper feeding can harm it.
worms....small bits of meat, depends on bird
Some baby birds (robins) eat worms, but to some birds, worms are VERY toxic!
If the bird is still laying there and the mother/father is still feeding the baby bird, the bird must have just fell out of the nest and there isn't anything wrong with it. One of the parents will get it to its nest or get it to a safe place and take care of it. If the parent(s) do not want anything to do with it then the bird is sick and not eating, they just give up. You should place the bird in a warm shoe box with hay and make sugar water and feed that to the bird by using a dropper. You don't want to feed it to much. There are site that tell you directions with feeding a baby bird. :)
It is most likely dead and the worms are eating and decomposing it.
If you have any cats keep them inside. Just nurse it back to health by keeping it warm and in a quiet place and feeding it every so often (every 15 minutes, if it won't eat then just leave the worms or mashed bird feed next to it and it might eat.) If it has a mother then you should probably just leave it though, the mother should be able to look after it.
bird seed, worms really anything but poo if too young cannot eat bird seed, feed mashed egg yolk mixed with water give with eyedropper and later, when starts having feathers, soak dry cat food in water till soft then feed to bird one piece at a time
if a baby bird is fed french fries nothing too harmful will occur. while these may be unhealthy for it, it will not harm the bird in any way. i suggest feeding a food more normal to the usual food of the bird
Bluebirds will sometimes come to feeders offering seed mixes with sunflower seeds. This isn't as likely though. Bluebirds are fond of berries and meal worms. Put a tray of meal worms outside and they should nab them up. Be careful, other birds will also gladly eat these.
The baby bird will need food Immediately. However it is unlikely that you will be able to feed it enough - it needs it parents.
You should feed it.
It needs feeding about every 20-15 mins.