Shinken Zemi Challenge experiment set for 1st to 3rd graders. This is an experiment set that children can enjoy, including the Challenge Waku-Waku Science Book. (Also includes experiment sets distributed at school.) Batteries have been removed. Also, the batteries in the Ultimate Watch are dead. Please prepare (or replace) them. This item has been used by a child. There may be stickers attached, assembly marks, name markings, writing, and some parts may be missing. Please consider this with the above in mind.