I gave this book to my granddaughters today. The older girl (age 4 1/2) had the day off from school so she got the first crack at the book and she asked me to read it to her at least a dozen times. We also watched the video I linked above a couple of times. She already knows most of the Hebrew colors in the book but a couple were unfamiliar to her (grey and brown in particular). So she had fun shouting out the color names for each page. The last few times, she joked around with me by saying a different color than the one on the page.
When the 18-month-old arrived home from daycare, I read it to her, too. She seemed to enjoy it and was attracted by the bright colors.
So I consider my purchase a success.