These are the laboratory exercises for a course we taught on Complexity Science at Columbia U.  A lot of it, but not all, is based on Allen Downey's book "Think Complexity". Currently, these labs are under revision. Our main issue was that they were to difficult and long and we are in the process to correcting for that, making some things optional, cutting other things.  However, we are likely to also add new pieces that make these tools more quickly accessible: little intuition pumps, to borrow a phrase from Daniel Dennett.  We hope to make these exercises as useful as possible for the maximum number of people and for that we could use anyone's support!