Marjolein en het geheim van het slaapzand (2010)

Marjolein's grandmother has a secret. Years before Marjolein was born she lived in the Forests of the Efteling and something happened there. But what? Meanwhile The Sandman has forgotten the magic formula to create sleep dust. For some reason he turns to Marjolein and her grandmother to help him retrieve the spell. An exciting adventure begins.