I Spy Books: Not Just For Kids
I Spy General Fun
I Spy books in general were fun for me as a kid. I used to check them out at my elementary school's library when ever I got the chance. I got better at finding stuff as I finished each book, finishing them faster and faster. Eventually I remember finding cool things in the images that I'd create my own I spy game.
You might think an I spy book couldn't be educational. But it could be the exact opposite. From reading to solving the sometimes difficult puzzles ( I think that's what you'd call them). I remember learning new words from this because of the weird things you'd have to find that not everybody uses on a daily basis. You also learn to hone your common sense and imagination eventually you'll be able to guess where the particular item will be so you look in the right spot the first time. (If your kid has trouble finding things like most do you might want to get him/her one of these books.)
I Spy a Funny Frog
This book in particular I believe was one of the first I read of the series. And, if I remember correctly it's one of the easiest ones also. So this is a perfect book to start your kid off with. As the books get a bit more difficult, the images are massively more impressive. Even grown ups can brush up on their skills by picking up these books. Once ready you could even possibly race your kid to find the item before each other (using a new book of course).
More I Spy Books To Check Out
There are a lot more than this but these could get you started. Click one you like and find more on Amazon.
There are a couple that revolve around certain things like this one and others like numbers, letters and so on.
This one was cool finding loot that only a pirate would love was fun.
This one was great, I remember all the fantastic images in this one. Including a cool sandcastle. Definitely a great one to check out.