Base 3 Blocks DIY
https://docs.google.com/drawings/d/1zQRMk3hNul12UjTkJf_HOuvwm3ILvFclAQ1HNYlrX44/edit?usp=sharing
Coordinates
https://docs.google.com/spreadsheet/ccc?key=0AktVD6-zeBn4dEZyNlF2MFNaNXFWOHExTlVUU21Kanc&usp=sharing
Mini Tangram
https://docs.google.com/drawings/d/1Mz8OQGxJZRYtFzyJSs2JWc6TlQnriyX9hSJyFHZqw2o/edit?usp=sharing