Each group needs

• balance, accurate to at least 0.1 g (such as a triple beam balance)
• 500-ml beaker
• 50- or 100-ml graduated cylinder
• modeling clay, one-half stick (50-60 grams)
• pan or tray to catch water that overflows from the beaker during the displacement process
• (optional) funnel, helps to limit the amount of spilled water
• 1-2 sponges and/or dishrags for wiping up drips and spills
• fine-point permanent marker or grease pencil, to write on the beaker; alternative: transparent tape that can be written on with a pencil
• several paper towels
• access to water and a sink