Could you help me identify these new plants?
These are two types of Croton Plants. The first is a Croton Mammy and the second a Croton Golddust. You can read my advice on how to grow and care for Croton plants in the Popular Houseplant section of the website. The picture is of a different variety, but the care is the same.
This is a Hawaiian Schefflera. You can read my care tips for this plant also in the Popular Houseplant section of the website.
These plants, especially the crotons, are considered poisonous and should be kept away from pets and children. You can read more about common houseplants that are poisonous in Don’t Feed Me To Your Cat! A Guide to Poisonous Houseplants