During British Science Week this year, P6/7 took part in the Astro nappy experiment to find the most absorbent material to use in space. They tested a variety of materials to see how many drops of water they could hold. They made predictions about which would be the best and worst materials at absorbing fluids and recorded their results in tables. They tested cotton wool, paper, sandpaper, plastic, greaseproof paper, thick felt, polystyrene and foil. They found that some materials like the foil, could contain water well , but not absorb it, as was the case with the plastic and the polystyrene. The best material was the sponge which held 1589 drops of water.