Year 3 have been learning about the properties of different rocks, particularly which rocks are permeable and which are impermeable. We carried out a simple investigation to test their strength where we dripped water onto a selection of rocks, using a pipette to see whether water soaked into the rock or ran off its surface. The children learnt which rocks would absorb water and were permeable and which rocks were  impermeable and would not allow water to be absorbed. We had lots of fun!