Sprig Toys Blocks 3 Little Pigs Playset The Uniquely Designed Blocks Are Made From Sprigwood? A Child-Safe Bio-Composite Of Recycled Wood And Reclaimed Plastic That Smells Like Pine And Has Visible Wood Flecks When Stacked The Blocks ?Lock? Together To Prevent Children From Accidentally Knocking Over Their Creations Packaging Is 100 Percent Recycled Chipboard Printed With Water-Based Inks Each Of The Building Sets Is Equipped With Both Small (5/8? X 1 3/4?) And Large (1 3/4? Square) Blocks We Sized The Blocks To Fit Into The Hand Of A 3- Or 4-Year-Old And Be Easy For The Child To Manipulate While Developing Their Fine Motor Skills