No one knows why Harry is wearing a necklace. Sidney thinks theyre for girls.But when Harry opens the necklace cover to reveal a minimicroscope the wholeclass i... » 

No one knows why Harry is wearing a necklace. Sidney thinks theyre for girls.But when Harry opens the necklace cover to reveal a minimicroscope the wholeclass in intrigued. Everyone wants to try it so Harry promises to show themall some wickedlooking fungi at recess. But he doesnt mentiom that to seethem theyll need to go outside the fenceand that means breaking a schoolrule. Will everyone follow him? What if Miss Mackle finds out? Has Harry gonetoo far this time? «