The mandrill is the largest monkey, and can weigh over 75 pounds.
The smallest monkey is the pygmy marmoset, which can be a tiny 4.6 inches tall!
One way to tell a monkey apart from an ape is to check the tail! Most monkeys have them, apes do not.
Monkeys have emotions just like humans. They can be helpful, affectionate, loving, fearful and even hateful. Best of all, monkeys love to play!