Do I have to convert to an LLC from DBA if I want to pay my children as contractors in my self-employed business?

I have read much around the topic of paying children to help with your family business.  I am self-employed and conduct my consutling work as "Doing Business As."  I know that I can pay and contribute to my children's retirement accounts for work that is age-appropriate such as filing, shredding, etc.  

 

Do I have to convert to an LLC to pay my children as contracts?