Kitty 2 said:
A Crassula. Probably a crassula ovata.
Also known by it's common name 'Jade Plant', 'Money Tree' or 'Money Plant'. Very easy house plant, and they can get quite big, and last for decades! We have a 20+ year old one, about 18" high, wide and deep ( 18" all round, then 😉 ) but it started off like yours.