I was raised bilingual and am trying to do the same with my kids, but they predominantly speak English. I also volunteer teaching Spanish at my son's preschool. This book is an EXCELLENT introduction to the alphabet and simple words. My younger child is not yet 2 and he is just learning his letters. He LOVES this book. He's learning his alphabet in both languages at the same time, and "getting" it. My older child, who is 4, loves this book for the vocabulary. He knows his letters in both languages, but his Spanish vocab is not robust. This book helps him feel successful when he remembers a word and he's old enough now to understand the sounds letters make (in both languages) and then use that as a hint when looking at the picture under the letter and trying to remember the word in Spanish. It's a simple and fun book. We read it so much, I have it memorized. We were on a road trip a few weeks ago and I was able to keep the kids entertained, reciting the book from memory. This will be the book I use at the school to "kick off" the Spanish curriculum.