I have sent several packages right from Amazon to children's hospitals. They are always looking for donations and it's good to get your name out there, even though you don't get any feedback.
A good starting point is to start with schools that you have friends or family in. Teachers will spread the word and you will be adding more schools before you know it.
Hey children;s book authors I sent my book to Fergie who has a YouTube Channel and I have been corresponding with her promo gal Antonia Marshall - hoping to get an approve to be read on her how. I could use some suggestions for podcasts for my children's books