Assorted Large Drilled Ball Set, set of 12, A 3mm hole is drilled through the center of each ball. Every set comes in a convenient plastic storage case, with a foam bottom that holds each ball firmly in place
A hands-on volcano model building project complete with safe, simulated lava eruptions. Learn all about types of volcanoes, parts of a volcano, how volcanoes function, and precious gems volcanoes may produce. Kit includes enough materials for 24 students, Meets national standards