Do NOT put apostrophies in plurals! Baby's is for if it's a baby's item, or if you are saying "The baby's walking", that would mean "The baby is" and it is meant to be babies. It is also dinos, not dino's. Dino's is for if you're telling someone if a dinosaur owns something or if you're saying "The dino's walking", then it would mean "The dino is walking". Also people use the wrong forms of 'their' for showing posession.