Fun book for suggested grade levels 3-7.  In my family the age level is 2 years to 70+, based on our enthusiasm.
932799
Fortunately, the adults in my family are slightly better behaved than the children or we might have had a brawl in my house yesterday when this book arrived during a visit of my son, daughter-in-law and two grandchildren, one 2 and the other 4.  One book, one 3-colored lens and 5 people.  That's just asking for trouble if those people don't subscribe to the "sharing is caring" policy.

This book is more fun than I had even thought it would be when I chose it from the Vine program.  And it's educational, but, let's face it, it's the novelty and the fun that attract one.  Looking at the pictures through the colored lens and seeing different images, depending on which color you're looking through.  Education is fine but fun is finer, at least for the youngest grandchildren.

Now, with the older grandchildren, I'm sure there will be appreciation for the ten ecosystems featured in this 63-page book:  (1) The Congo Rain Forest, (2) The Simpson Desert, (3) Loch Lomond, (4) The Andes Mountains, (5) Weddell and Ross Seas, (6) The Redwood Forest, (7) East Siberian Taiga, (8) The Serengeti Plains, (9) The Ganges River Basin, and (10) The Apo Reef.  Each system is covered in 6 pages:  a 2-page colored introduction to the area, a 2-page color "Observation Deck", a black and white Nighttime and Twilight species guide and a black and white Daytime species guide.

After checking out the species guides, the reader goes to the colored pages to look at them through the colored lens which comes with the book.  Looking at the pages through the red square you'll see daytime animals of the area.  With the green lens, vegetation and habitat of these animals shows up, and with the dark blue lens you will be able to see nighttime and twilight animals living in the habitat.

I have only a few criticisms of the book:

(1)  There is no written exposition about the habitat and vegetation other than things such as "desert, grassland", "temperate forest", etc.  You're on your own when looking through the green lens and sometimes it's hard to tell exactly what you're looking at.

(2)  My aging eyes had a good deal of trouble seeing through the dark blue lens to identify the nighttime animals.  I recommend sitting in an area with excellent light to be able to distinguish the figures.

(3)  Only one 3-colored lens is provided and each colored viewing square in that lens measures only 1.5" x 1.5".  I'm off to the crafts store to see if they have any suggestions on how I can make more viewing lenses.

In spite of those drawbacks above, this is still a 5-star product for me, based on the enthusiasm of both the adults and the youngsters in my family and the book's lovely and novel look.
1929263
Super book for my kids. They all enjoy hearing it read to them, and they are ages 4, 7, 9, and 13!
3709316
Funny book which worked with a 2 year old and a 4 year old.  Fun for the children and the adult reading it (for the nth time)
3091052
This is a fun book for my almost six year old son. Would probably be best suited for ages 3-5. He loves it on his Kindle Fire.
2275333
I read this to our 8-year-old. It's too advanced for her to read on her own, you'd have to be at least 12, but it's a good quantity of information and she enjoys having it read to her.
378506
I see the age listed as 8-12.  My 8 year old did well with the level of writing.  There were some words that were a learning experience, but overall I feel he was able to keep up, and he learned a lot (as did I while helping him with the report).  If you are buying this for the advertised age level, I think you will be happy.
4803266
We enjoy this book but my toddler who just turned two is starting to lose a bit of interest. It's also a bit small, even for a toddler. But yes, we enjoyed it between 14 and 22 months of age!
2212551
Bought this for my very outgoing 3 year old because we've been trying to teach him stranger danger but I think the book is targeted for an older age group.
3706795
I got it for my grand-daughter last year when she was 7, she requested it again this year.  Obviously, she loves it, reads it cover to cover.  Still age-appropriate.
3370111
Fun story, great artwork, just long enough to feel like a story, but not so long that it takes forever to get through (maybe 10 minutes at a moderate pace). Kids enjoyed reading it with me. Recommended age is 3-7 years old.
1135956
Says a 7 year old, "It was a good book. It was funny. It had a happy ending. Ages 7 and younger would like it okay. "
1783282
This book is a good level for my 11 year old son who has been playing on and off for two years.
3421514
I'm not sure what age this book is aimed at, but I'd hold off for 10+. We bought it for our 7 year old and it was a bit overwhelming! Other than that, it's a great buy!
2547223
I love this book! I'm 10 and this book is very age appropriate. it is the third book in the confectionaly yours series.  it has recipes that sound very delicious. I would recommend this book to 7-12 year olds.
2951970
I have three kids 4 1/2, 3, and 2. They all like this book. It is fun to read to them and they want this book often.
3170552
Interesting, well written, and both adults and kids from 2 to 100 will love it and find something really fun to participate in.  We need to challenge our children and find something fun to do with them that will also teach them some really great things.  I wish we had had a book like this when our children were younger and doing science projects, but we will certainly do things with our grandkids.
3132079
This book is rated for ages 4 - 8.  My 6-year-old daughter breezed through it in 15 minutes at most.  While she did have fun doing that, I feel $4 is too steep a price for 15 minutes of fun.