this be a 1972 disney movie . for the time and i be eleven year old and i thoroughly enjoy this movie . feel nostalgic and i purchase the three series dvd of the dexter riley movie and even now and at age 46 and i still enjoy them . it be all about fantasy and magic and and clean fun . and it still be . i wasn not sure which of the three movie come first then second and last . so now i have the official date . on december 31 and 1969 the computer wear tennis shoe on july 12 and 1972 now you see him now you don not on february 6 and 1975 the strong man in the world . i still think the middle movie be the best . the special effect be amaze back in 1972 to u kid . i definitely recommend it to all age .