CITIBLOCS are safe,green and educational. Age old proportions newly crafted in wood for all generations of Builders. CITIBLOCS are made of light weight pine handy for all ages and for creative construction. CITIBLOCS for family play and for the classroom! The unique proportions of Citiblocs enables hours of creative learning fun for everyone. CITIBLOCS are all the same SIZE and SHAPE which enables Building without Borders! Cities and Towers - But also Trains and Trucks And Creatures and Cars Build Anything with CITIBLOCS Gravity & Imagination & CITIBLOCS No glue - No snaps - No Small Parts - Its all about Dexterity and Focus and Innovation.