Changes, Changes by Pat Hutchins shows how a collection of blocks can transform into various things. This website shows how one teacher used the book to inspire her students to stretch their building skills. She used colored blocks, but you could use whatever blocks you have.
Honeycomb Beat Game - Use the pattern block spinner and cover the board using the shapes you spin - First person to cover board wins. Part of the Problem Solving Activities for Pattern Blocks K-2 packet.