Good gawd child with your goats and rabbits now you gonna hatch chickens. Bless your heart, you are busy aren't you? Here is a link for you with all sorts of incubatators Here is a link that might be useful: chicken incubators

I would use a potted rose bush,with a rose variety with single petaled blooms. It depends on the time of year the fair will be held. What would be blooming then? The simpler the structure of the blooms,the easier it is to demonstrate pollenation. Cross pollenation would be merely taking pollen from one plant and putting it on the female flower parts of a different variety.Self pollenation is taking pollen from one flower on a plant and pollenating the same bloom or a different bloom of the same variety. The first thing he needs to do, is to learn the latin names of the male and female flower parts.There are many sources of information,with pictures,on the net. Try searching the net,using Pollenation,plant breeding,hybridization,crossing plants. Remember that google is limited and other search engines may give better results. Del

Regarding the giant corn of Peru: Staircase Farms of the Ancients. National Geographic (1916) Cuzco Corn O. F. Cook The usual behavior of the Cuzco corn in the United States is to produce plants of enormous size that mature very little seed, often none at all. It has been taken for granted that the size of the plants should be in proportion to the enormous kernels, and that our seasons were not long enough to permit this type of corn to mature. But in Peru one does not see these gigantic, infertile plants, nor any indication that the corn crop requires a large amount of heat to bring it to maturity. The impression one gets from the Peruvian corn-fields is that the plants are not taller than with us and rather more slender, the most striking peculiarity being the prevailing red color of the foliage. The best development and largest ears of the Cuzco corn are found in some of the higher valleys, at elevations between 9,000 and 11,000 feet, in districts where the summer climate is cooler than in any of the corn-growing regions of the United States. Thus it becomes apparent that the possibility of utilizing the Cuzco type of corn in the United States is still practically untried, because of our lack of information regarding the normal behavior of the plant and the natural conditions to which it is adapted. As might have been expected, if these facts had been known, the best results thus far obtained from the Cuzco corn in the United States have been in California, in the cool climate of the coast districts, where there is too little heat for our eastern varieties to thrive." Karl Here is a link that might be useful: Cuzco Corn

"One last thing is for the student to know why their experiment is important in the real world." One of my problems with the original hypothesis of which kitchen scraps would a worm prefer is how that makes a difference. It's not practical to separate food scraps into separate components. You might show that worms prefer watermelon rinds to beans but have you ever heard anyone complain about the amount of watermelon rinds causing problems at the landfill even after the 4th of July picnic? In this world of 'going green', I think I'd look at items that do present problems at the landfill but should not. A recycling company wants the easy to recycle stuff like newspaper, magazines, junkmail and old telephone books. Even in our city where we now have an active recycling initiative for paper and plastic we have things that are routinely sent to the landfill. A couple things come to mind. One is the papertowels from a restaurant or airport restroom. You could probably even get the information from the airport to compute the tonnage of waste paper they deal with. Another is disposable diapers -even though human waste is probably not something I would think a young child should be exposed to. And I'm not sure how well the worms can handle decomposing diapers anyway. A better choice would be lawn scraps. Particularly now that this is the time of year people will sending tons to the landfill instead of composting it themselves. You could even separate the lawn refuse into pure grass clippings vs chipped shrubbery scraps. I am aware that these will heat up and all that but you can do a week of precomposting them all after innoculating them with a measured amount of casting tea before adding the worms. The experiment would then not be a preference study but rather one of efficiency. Perhaps a mixture as another variable. After a specified time, sift the vermicompost for castings and compare with unprocessed material. You can do both bulk and weight comparisons.