See related story: Wrap Up a Holiday Hack

Ethan Shoshan tries to get his solar-powered noisemaker working by holding the solar panel up to a light.
Rachel Metz
Ella Park-Chan shows off her LED ornament while workshop teacher Giana Gonzalez helps her brother, Ryan, with his.
Rachel Metz
Federico Muelas shows participants how to hack into remote-control cars during his workshop.
Rachel Metz