No. Even information correctly used for school projects may not be posted on a website without permission.
Fair use is a complex legal doctrine that considers several factors, including the purpose and character of the use, the nature of the copyrighted work, the amount used, and the effect on the market for the original work. While educational purposes can sometimes fall under fair use, simply citing a source does not automatically grant permission to use and further distribute that work, especially if it is being posted on a public platform like a school website. In this case, Donny would still need to obtain permission from the science museum in order to legally post his project in that context.