Features . Tree Blocks uses only materials in our toys which are of the lowest environmental impact possible. Today 95 of materials used are from sustainable sources. We will continue to use only non toxic. Child safe finishes and to test each toy for safety before offering it for sale. 18 piece extra large barked blocks in cotton sack. Made with reclaimed and sustainably harvested materials. Each piece is precisely cut in heights of 2 4 6 8 and 10 cm. Encourage little ones to develop important spatial and creative skills with this awesome block set . For ages 3 years and up Specifications . Weight 6 5 lbs