The ever trustworthy and excellent Family Publications have recently published "Jesus Comes to Me", by Dora Nash, a book to help parents, catechists, and teachers prepare children to receive their first Holy Communion.
This is a really good resource for first Communion catechesis. The text is simple and straightforward, completely orthodox and child-friendly. Dora is an experienced teacher and her expertise shows through in the details of this book. There are exercises for the children to complete and even a cut-out-n-vest priest. I heartily recommend this for parishes.
Jesus Comes to Me is available priced £6.50 from Family Publications. (Bulk quantity discount are available for schools and parishes.)