What a nice idea. Seeing as the age is 2 I would recommend no commercial product or program. There must be some significant (to you) lessons you would like to convey. If I had a grandchild I would pick topics like the prodigal son or the pearl of great price, talking about the Good Shepherd, and then look for resources or coloring books etc about that topic. Make it fit your grandchild and be about what you feel are the most important lessons to share. When our daughter was little I made her a cloth and cardboard cut out of the Good Shepherd passages. A green fabric circle for the pasture, cardoard gates, a black fabric piece for the hole, some sheep and a shepherd. She cherished it and loved telling the story to others and move the pieces around to tell the story. When they get older there are lots of material out there. Just my humble 2 cents.
PS, if you have a particular lesson try googling “teach materials” and then the name. I just did the Good Shepherd and there are nice resources out there.
Coloring helps with dexterity.