Doodling without mess

Certainly simple invention like this really takes the headache off parents having to clean up after their toddlers after a doodling session. This Aquadoodle from Toy'Rus writes simply using water. Being a chemist, Mommy could guess what's in the doodle mat. Writes wet and disappears when dry. Isn't it fascinating? Can you guess what's the chemical? Here's Keziah having fun with Shu Shu on Sunday after Daddy and Mommy opened the set which they brought during a children fair at United Square atrium last week.