On a small tile with horse on right edge of pg
On the horse top right
It's almost smack dab in the center of page 9. It's on the face of the yellow clock, which is between the fish and the masquerade mask.
Hint 1 : It is on page 8. Hint 2 : It is deflated. Hint 3 : It is red.
The first is on page 28 about two inches from the top pointing up and down along the window frame. The second is at the top of page 29 attached sideways to the yellow strings holding the hanging flower pot.
The cork on the bottle in I Spy Ultimate Challenger is near the very bottom, towards the left side of the screen. Look for a small cylindrical object that is darker in color compared to the rest of the bottle.
The bottle-cap knight can be found on page 21 of the I Spy Fantasy book.
In the I Spy Extreme Challenger book, the bubbles can be found on the page that includes the "Under the Sea" scene. Look for a cluster of bubbles floating around in the middle of a coral reef image.
I'm not able to provide real-time information on the locations of specific objects in games. However, I recommend carefully scanning the scene, looking behind and under objects, and examining details closely to find the bottle cap in the I Spy Gold Challenger game.
on the left of the page, standing upright
It is on the camel stamp on the left page
It is somewhere on page 8 and 9
The cat is riding a yellow bike at the top of the page
one of them is in page 22 and the other one i think it's in page 23
It is in the top left- hand window on page 26
They are the hotdog buns on the two forks in the middle of the page.
A mouse can be seen on page 17 on the badminton racquet.