Water from the Rock and Manna from Heaven Sunday School So we’ve seen how God used a log to turn bitter water into sweet. We’ve seen God rain down bread, manna, from Heaven. We just learned about God giving the Israelites water from a rock. All 3 of these things aren’t ‘normal’. We don’t usually get water from a rock; we get it Author: Bible Curriculum[PDF] Bitter Water Turns Sweet - First Christian Church of High Bitter Water Turns Sweet Exodus 15:22-27 Craft/Activity: Sweet Water Students will make bitter water turn into sweet water to remind them of how Moses threw a piece of wood into the water and it became sweet. Materials 1. Lemons 2. Small Paper Cups 3. Pitcher of Water 4. Popsicle Sticks/Tongue Depressors 5. Sugar 6. Knife Directions 1.