We used to give our clients a free electronics toy every year. The only catch is they are strictly build it yourself! We are no longer doing this, but you may be able to reproduce these projects from the documentation we provide below.

Name Description Links
Cyclops A "Persistence of Vision" toy that modulates an array of Light Emitting Diodes so it appears to write in the air with light. You can program what it says with the help of a spreadsheet.
Amplifier An amplifier for an electret microphone, designed for NIST.
Theremin A strange musical instrument.