Yeah I would recommend a small amount to see how it goes. Typically anyone who sells the worms either sells them in a preloaded pod, same as hornworms, or sells leaves, chow or premade food as well. The preloaded pods a complete pain in the a@$. If you can just get some worms and some food that is the way to go. If you find a silkworm pod with some food and a few worms it may be a good test to see if she likes them. Just know raising them is much easier and less messy minus the pod in my experience. Good luck with your little girl!
Kyle