Fill the sink with warm water and provide measuring cups, a funnel, and containers of different sizes. Child experiments freely. No task. Just water and tools. The exploration of volume, flow, and displacement occupies children for 30–45 minutes.
What you need
- measuring cups
- containers of different sizes
- funnel
How to do it
- 1Say: "The sink is now a water laboratory. You have tools. Go."
- 2Set out measuring cups, a funnel, and containers of different sizes. No instructions, no task.
- 3Let them explore freely. Ask open questions if they pause: which cup holds more?
- 4If interest fades, add food colouring or one challenge: can you move all the water into that bowl?
Variations
- Korb-Tür: If they won't start: pour water yourself into a cup, dump it back. "Your turn." Curiosity pulls harder than instruction.
- Ausstieg: Pull the plug. Watch the water drain while they're still interested, not when they're tired.
💡 Parent tip
The mess is the point. Lay down a towel before starting. Children allowed to make a managed mess are calmer than those anxious about spilling.
What your child develops
- Volume intuition — repeatedly filling and emptying builds understanding of capacity
- Flow and cause-effect — discovering how speed and angle affect water behaviour
- Free exploration — unstructured sensory play supports self-regulation
Safety notes
- Ensure water is warm not hot. Supervise children under 3 near water.
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