Colorful World, Farm

In each of the four Colorful World board books, on each of their pages, there is a collection of things, and a different puzzle to solve (and something to learn about nature at the same time).
 
Look carefully! Something’s not the same on the Farm ... Find what’s different!
 
Which cow is the most colorful? Which baby is not a chicken? Find the one that’s not a donkey. Are they all farm vehicles? Can you find all the differences in this colorful world?