Play is an important part in Design. It does not only mean to play well with the tools, to hone the craftsmanship, but more importantly to keep an open mind to everyting that could be inspiring and try them out.
Interaction Design Methods / Design Theory

Wireframe for pixSmix

barbie

Barbie Goes to China (Cultural Probe)

cardsorting

Card Sorting for Williams-Sonoma.com

playwithit

Play with It, A Design Process Model for Design Practitioners.

(Instructional) Graphic Design
bicycle

Poster Design for Bicycle Community Project

typography

Letter Design to Express Slowness

symbol

Symbol Design for a Combination of Number Two and Fossil.

100things

Draw 100 Things

Hardware Sketching / Everyday Creativity
animate

Ani-mate, Prototyping for Animators in Digital Age.

poster

Photo Collage Creativity

poster

Tab Redesign, Mozilla Summer Challenge 2009

poster

Color Music, A New Way of Selecting Music