"Tsumiki" chalk building blocks by a Japanese company. This is such a cool idea for kids to design there toy with chalk and then redo it over and over again. I bet you could chalkboard paint wooden blocks and DIY.
iwoody iphone with soft, spongy ear buds that double as chalkboard erasers, this toy smart phone, crafted of natural wood, is perfect for occupying little hands while mom and dad are on the phone. Includes one piece of chalk.