Here are some of my tried-and-true reading materials for introducing children from three and up to Shakespeare.

1. Shakespeare’s Storybook: Folk Tales That Inspired The Bard by Patrick Ryan and illustrated by James Mayhew is at the top for content and darling illustrations. Get it here.
2. I am a big fan of sticker books that complement whatever we are studying at the time. This Usborne Shakespeare Sticker Book by Rachel Firth and illustrated by Diego Diaz is perfect even though it is difficult to get ahold of since Usborne doesn’t sell it through their US website. Get it here in the US or if you happen to be abroad get it here. 
3. Marguerite Tassi has done a wonderful job with Poetry For Kids: William Shakespeare and it has the speeches and poems that you will want your children to know. The illustrations by Merce Lopez are also a treat, full of humor and whimsy.
4. William Shakespeare and the Globe by Aliki is a good history of the poet and his continuing legacy. Again, excellent illustrations. Get it here.
5. Jane Sutcliffe’s Will’s Words: How William Shakespeare Changed the Way You Talk is an energetic introduction to the concepts of theater, performance, language and, of course, to Shakespeare himself. Its lively tone and careful explanations make it good for young children. Get it here.
6. Finally, just because I love a good board book I added A Midsummer Night’s Dream: A BabyLit Fairy Primer to the list.  It has very pretty illustrations by Alison Oliver and contains some of the most famous poetry from the play. Get it here.