I am talking to Joshua Zimmerman, the founder of Brown Dog Gadgets. Brown Dog Gadgets sells inexpensive so-called make-and-take projects that kids can take home once they are finished with their classroom activities.
Originally a middle school teacher, Joshua found it very annoying as a teacher that all the fun science activities his students were doing had to be disassembled at the end of each class. This is pretty much how Brown Dog Gadgets came to be.