Stamp or draw with water and watch the area dry and the color disappear after thirty seconds. Sing along with the song Old McDonald Had a Farm. Sensors in the mat let kids pick an animal to hear their sound. The Aquadoodle mat combines musical doodling with water. Just fill the magic water pen with water, choose a fun farm doodle sound, and doodle anything. Songs, sounds, and giggles sound out as you create designs. When finished, wash the mat and start over.