My lo is 12 months old. I took her to a Chinese restaurant and since the high chair had no tray, I had to basically put her food on the table and she ate off of the bare table. It was a clean table but the staff seemed appalled by this (she did make a horrible mess no matter how you look at it). They offered her a plate twice, but she doesn't know how to "use" a plate. She will inspect it for 5 minutes, and then throw it on the floor, and all the food with it. It's just better if nothing but food is too close to her when she's eating.
When should I try to get her used to the whole plate concept? Maybe I should get a suction plate so when she tries to move it, it won't budge, and then she stops trying? It worked with a chin strap on her hat, so maybe it will work with a plate.