That is really a nice gift for your grandson. He'll treasure it when he grows older.
Good idea to put numbers and lettering around the edges but you forgot Å,Ä and Ö
They pick up more than one imagine I think, even when they're very young. I used to read, read, read and read some more every night to my son and at 11 now he is very litterate.
Good job with it, very beautiful!
Tom