A rainy day doesn't have to be a reason to stay indoors. With the right clothing, it becomes the perfect day for exciting discoveries. Here are some simple ideas.
Who can make the biggest splash? This simple game is not only fun but also intuitively teaches physics (force and displacement). Observe the ripples that are created.
Place an empty jar or a cut-off plastic bottle outside. After the rain, mark the water level with a pen. This makes the abstract concept of "precipitation amount" visible and measurable.
Collect various natural materials (leaves, stones, sticks, feathers) and have the children predict what will float in a puddle and what will sink. A simple experiment on density and buoyancy.
Mud is a wonderful sensory experience. Let the children draw pictures in the mud with sticks or make mud prints on large sheets of paper with their hands (if it's not too cold).
Pause and listen. What does the rain sound like on an umbrella? On a roof? On the leaves? This mindful listening sharpens the senses and has a calming effect.