A Brooklyn man kidnapped his 11-year-old neighbor as she waited for a bus — but his sick plot was thwarted by his own mother, police and sources said Wednesday.

Boruch Lapp, 29, was arrested Tuesday after he allegedly snatched the young girl from her summer camp bus stop on the corner of Bay Parkway and 77th Street in Bensonhurst, the NYPD said.

“Your mom called me, she wants me to show you something,” he allegedly told the child, according to police sources.

He then took her to his bedroom and stood with his back against the door to keep her from leaving, according to a criminal complaint.

The man allegedly admitted to detectives that he’d been planning to kidnap someone for a while, according to sources.

But his repulsive scheme was foiled when his mom found the girl in his bedroom and alerted the authorities, staying with the child until she was recovered.

She apparently checked the room after receiving a call from the child’s mother stating her daughter had vanished, sources said.

The girl’s mom reported her missing around 8:30 a.m. after going to tell her that the bus would be a few minutes late — only to find her gone from the street corner.

Detectives were interviewing the missing child’s parents around 10 a.m. when her dad got a call from the Shomrim Volunteer Safety Patrol, who told him his daughter had been found.

The girl said she’d recognized the guy who took her as a man who lived across the street — and that his mother brought her back to the bus stop after finding her and waited there for authorities.

“She was waiting for the bus and then he came and took her and didn’t let her leave,” an NYPD spokesman said.

The child was in tears when she was finally reunited with her parents, and appeared scared and confused, but otherwise unharmed, a Shomrim volunteer told The Post.

She was taken to Coney Island Hospital for evaluation.

Lapp was charged with kidnapping in the second degree, endangering the welfare of a child and unlawful imprisonment.

He was being held on $200,000 bond following his arraignment in Brooklyn Criminal Court on Wednesday afternoon.

Lapp is due back in court on Monday.

His attorney, Stacey Richman, told The Post that her client has mental health issues.

“Quite obviously there are mental health issues afoot here,” she said.