Materials
Trays Water
Wooden block Sponge
Plastic toy Tissue
Rubber ball Piece of cloth
Cotton balls Rubber eraser
Instructions
1. Pour some water onto several trays.
2. Set the wooden block into the water on one tray and the sponge into the water in the other tray.
3. Observe for a few minutes, then pick up the block and the sponge to see what has happened.
4. Repeat the process with the other objects.
