Scientists can figure out the age of a mammoth by the amount of rings on their tusks, which can be up to 4.3 m (14 ft) long! Good for nature AND for you! EUGY encourage creativity as well as being environmentally friendly.So go on...bring home your wild! Our products conform 100% to international safety standards (EN71-1,2,3 and CPSIA). A EUGY pack contains 7 flat cards with individually numbered pieces, all ready for you to assemble.