Replying to My Daughters First Skis

My daughter is turning 18months old on the 21st of December but this Christmas I wanted to get her on a pair of skis for her first time. I've been shopping online for skis for her size and I don't know if I should buy her plastic skis or not because she is little still. If anyone knows anything about buying ski gear for small children lemme know. Also if you got any advice about having fun teaching little kids or just good memories from being a toddler learning to ski go ahead and share those in this thread too.