this dude finds a kidnapped child called toys

Part One of the Toys Killer quadrilogy

While on a stakeout, Judith Gray, a beautiful, tough cop, is trapped inside a warehouse full of toys that have been awakened to murderous life by a strange child of darkness.

When three year old Willy wanders away from home he falls among thieves. They are forced to kidnap him. The police ask Dickie, his elder brother and his friend, Johnny to help in the search. Johnny's friends all join in and meet with varied adventures. The children find Willy in a disused warehouse but cannot rescue him. Three more are caught by the gang who lock them in with the now unconscious gang leader and escape with the jewels. The police, alerted by the children, capture the gang, recover the jewels and finally rescue the children, including Willy

A toys begins to realize he is played by children and he starts to question his existence

After the death of his wife, a wanted thief decides to surrender his disabled child to an orphanage and emigrate, but his son's first words evoke love and willingness to bear responsibility.

Babies are hardly monster-like, unless you're a toy. After escaping a drooling baby, Tinny realizes that he wants to be played with after all. But in the amount of time it takes him to discover this, the baby's attention moves on to other things only an infant could find interesting.

A serial kidnapper is at work.