Here are some of the decorations made from 3 old t-shirts, cardboard (out of the dumpster), and a recycled book, and a black marker:
Clifford, welcoming people to the party!
pom poms (inspired by this link)!
pom poms, other garland made from tying t-shirt strands together!
Different garland made by sewing paper shapes and t-shirt scraps together!
A simple sign. Mr. S wanted the theme to be "red cake," hence the cake.
Just funny - cooling the watermelon in the tub because it was too big for the refrigerator:
Treat bags: sewn together one way, filled with candy and then sewn together with a different fold. Very easy!