Opal Dream -its about a boy's quest to find his little sister's imaginary friends who got lost in a mining quarry where his dad works. His dad was accused of ratting while looking for the lost imaginary friends. he helps his ill sister find them because he learns that his sister feels better when people believe that her imaginary friends are real. The story was taken from the book Pobby and Dingan from Ben Rice
James and The Giant Peach - James Henry Trotter, a four-year old boy, has had a happy life but is orphaned as a result of a bizarre accident: his parents are killed and eaten up by a rhinoceros which has escaped from the London Zoo (although rhinos are, in truth, herbivores). He is sent to live with his two repulsive aunts, Spiker and Sponge, who abuse him frequently. But things take on an odd turn...the beginning of his adventure.
One spring, on a farm in Maine, Fern Arable (Dakota Fanning) learns that her father plans to kill the runt of a litter of newborn pigs. She successfully begs him to spare the piglet's life. The farmer gives the tiny pig to Fern, who names him Wilbur and raises him as her pet. To Fern's regret, when Wilbur grows into an adult pig, Fern is forced to take him to the Zuckerman farm, where he is to be prepared as dinner in due time.
Edward Scissorhands is a 1990 American fantasy film, written by Tim Burton and Caroline Thompson, and directed by Burton. The film features Johnny Depp as the eponymous Edward, Winona Ryder, Dianne Wiest and Anthony Michael Hall. The plot revolves around a man named Edward, an inventor's creation, who has dangerous shears and scissors for hands, and appears frightening, who is adopted into a colorful, but stereotypically suburban, family.
The film is a comedy-drama set in an exaggerated and highly stereotypical vision of American suburbia and the typical families that inhabit it. It intentionally combines clichés and styles from the 1950s, early 1960s and the late 1980s.
these are mosty old films which i think are timeless and since you've mentioned he's seen a lot of movies made at his time, i doubt that he has seen any of these. must see =)