"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.
What if LEGO pieces were made of wood? It's hard to imagine a world without little plastic bricks, especially if you have a kid who's obsessed. But what if LEGO were made of wood? The cool part is that they actually exist.