Ossicones and oxygen

Electric play dough - a bit more explanation

Electric play dough

Christmas tree play dough circuits

Electric play dough robots

Bright and dim play dough lights

Electric playdough infinity mirror

Finding conductors with a play dough circuit

Play dough traffic lights

Remote control and infrared light

Press stud circuits

Which way is the wind blowing?

Glowing in the dark

Speakers and sound