Little Rad Things appears to be a legitimate website. The site offers a variety of cool, vintage, and sustainably made clothes for kids. The brand's mission is to empower kids to spark joy for others by being totally rad. The website has received positive reviews from customers, with many praising the quality of the clothing and the fast shipping. The company also offers hassle-free returns and exchanges, which adds to its credibility. Additionally, the brand has a presence on Facebook, where customers can share photos and experiences, further indicating its legitimacy.