Is it Math? Is it Art? It's both- simple and beautiful. Test your artistic and math abilities with our String Art kit. Use colorful string to create beautiful geometric shapes with our provided templates. Consisting of only string and wood, even the youngest artist can assemble this crafty kit with ease. What a great way to learn math. Once completed hang your creation on the wall. Decorate and color the wood with markers or paint (not included). Baltic birch plywood laser-cut wooden hoops & colored string. Circular 5 Hoop set: 5 nested circular hoops with 20, 30, 40, 50 and 60 holes. (8 string skeins are included to get you started - each skein is about 8.75yds long) Recommended for ages 8+ - younger children will require help to string the hoops SIZE INFORMATION 20 hole circular hoop - 4" diameter 30 hole circular hoop - 5" diameter 40 hole circular hoop - 6" diameter 50 hole circular hoop - 7" diameter 60 hole circular hoop - 7.9" diameter