Special Properties Rock Collection
Like early humans, your children will discover that rocks can be useful! This set includes: pumice (the rock that floats), optical calcite (look through it to see a double image), and magnetite (naturally magnetic). Description cards outline historical use and properties of each. Ages 6 and up.
For guaranteed Christmas delivery (in stock items, non-expedited) order by 12/12. (West Coast shipping address 12/15)