Bamboo microscopes that cost just $4 are being made in India by a group called Jodo Gyan. They're hoping to supply kids with more hands-on learning, and get away from rote memorization.Link
Nature has an article about this, with photos of the microscope and of a woman making them.
Mark Frauenfelder is the founder of Boing Boing and the editor-in-chief of MAKE and Cool Tools. Twitter: @frauenfelder. His new book is Maker Dad: Lunch Box Guitars, Antigravity Jars, and 22 Other Incredibly Cool Father-Daughter DIY Projects