Marjolein en het geheim van het Slaapzand (series)
- Production country: Netherlands
- Production companies: Four One Media, Efteling B.V.
- Release date: 7/9/2010
- Release date of last episode: 9/17/2010
- Series status: Ended
- Seasons count: 1 ( List of episodes )
- Episodes count: 12
