I remember watching a movie in the 80's maybe early 90's where I think a little boy goes through something like a picture or painting . There is creature played by humans one is a turtle that acts reaaly slow. I was trying to find the name of it

Was robin wiliams in it? There is a movie where people go into paintings its called "what dreams may come" or if its not you can look on this website imdb.com that website has all info on movies and stuff, my hubby uses it all the time