I found an easier way to do this:
Child Kidnapping movies (numbers 1 through 25 were after 1996 that is why I did not include them - some of these movies were about real life child kidnappings)
if you go to this link - you can click on each title that is listed below for more info on that movie.
http://www.imdb.com/keyword/child-kidnapping/
26. To Love, Honor, and Deceive (1996) (TV)
27. Ransom (1996)
28. "Millennium" (1996)
29. Camping Cosmos (1996)
30. Traces of Death III (1995) (V)
31. Twin Sitters (1994)
32. Chung hing sam lam (1994)
33. The Flintstones (1994)
34. Clifford (1994)
35. Corsa dell'innocente, La (1993)
36. Jack the Bear (1993)
37. They've Taken Our Children: The Chowchilla Kidnapping (1993) (TV)
38. Khuda Gawah (1992)
39. Small Kill (1992)
40. Batman Returns (1992)
41. The Kissing Place (1990) (TV)
42. The Punisher (1989)
43. I Know My First Name Is Steven (1989) (TV)
44. Tree of Hands (1989)
45. Original Sin (1989) (TV)
46. Willow (1988)
47. Where Are the Children? (1986)
48. Rockabye (1986) (TV)
49. Ewoks: The Battle for Endor (1985) (TV)
50. Little House: Bless All the Dear Children (1984) (TV)
51. Ronja Rövardotter (1984)
52. Indiana Jones and the Temple of Doom (1984)
53. Adam (1983) (TV)
54. Kidnapning (1982)
55. Terror caníbal (1981)
56. Blauvogel (1979)
57. Grand escogriffe, Le (1976)
58. Giustiziere sfida la città, Il (1975)
59. Murder on the Orient Express (1974)
60. Nitten røde roser (1974)
61. Hell Up in Harlem (1973)
62. Olsen-banden i Jylland (1971)
63. The Brotherhood of Satan (1971)
64. 5 i fedtefadet, De (1970)
65. Tres noches de locura (1970)
66. Næsbygårds arving (1965)
67. Tengoku to jigoku (1963)
68. Atomic City (1952)
69. M (1951)
see 1514