Final answer:
The sentence lacked quotation marks around the quoted text, and the name of the person being quoted was incorrectly abbreviated. After corrections, the sentence should include proper quotation formatting and the full name 'Frederick Douglass'.
Step-by-step explanation:
The sentence you've provided is missing quotation marks around the quote, which is essential for properly formatting punctuation and maintaining clarity in writing. The corrected version of the sentence should read: "It's important to invest in our children's education and wellbeing from an early age because it is easier to build strong children than to repair broken men." -Frederick Douglass
Additionally, it's important to attribute the quote correctly. The quote seems to be a paraphrase of words originally stated by Frederick Douglass, not simply 'Douglas'. Proper attribution is crucial in academic writing to avoid plagiarism and honor the original source of information or ideas.