tsumiki chalk : building blocks
This looks fun. The Tsumiki Chalk Building Blocks set is made by Japan's Nihon Rikagaku Industry, a company known for producing high quality dustless chalk for close to 75 years. Yes, you can be known for things like this! Even better, they are known for fostering a supportive working environment for mentally disabled adults, who comprise about 70% of their workforce. The company is founded around this value and mission.
The box set includes 7 wooden blocks, 6 dustless colored chalk sticks, a mini eraser and chalk sharpener. On sale for $48 from A + R.