MORGAN HILL, Calif. (AP) — A Northern California preschool teacher is facing jail time after pleading no contest to slipping sleeping pills in toddlers’ water cups.

Santa Clara County prosecutors say 59-year-old Deborah Gratz entered the plea this week to a charge of attempted child endangerment.

Gratz worked at the Kiddie Academy in Morgan Hill.

Prosecutors say she told police she slipped Sominex in the cups because she wanted the children to sleep longer during naptimes.

Gratz was caught after a teacher observed her putting the pills in the cups. The cups were confiscated before any children could drink from them.