Unvarnished blocks have a natural feel and do not easily fall apart when building Part of Grimm's "4x4" building family this set combines seamlessly to other large building sets from Grimm's including Supplement Building Set (item 10201). Manufacturered by Grimm's Spiel und Holz Design. Vibrantly colored using certified non-toxic water based stains; finished with food-grade oils Includes sturdy 17- inch (40 cm) square storage tray which can also serve as a base for building structures A large size "first building set" for Age 1+ containing heirloom-quality blocks handcrafted by European artisans