The Bobbsey Twins

#20 The Weird Science Mystery by Laura Lee Hope (Stratemeyer Syndicate), 1990.

Before I begin, I’d like to acknowledge Sean Hagins, for supplying me with photos of this book! Usually, I take pictures of books myself, but I just couldn’t find a physical copy of this one. Sean is a big fan of the Bobbsey Twins, particularly the New Bobbsey Twins mysteries, and you can see some of his video reviews as well as videos about his photography work on his YouTube channel, SJHFoto. Thanks, Sean!

The Bobbsey Twins are all getting ready for their school’s science fair. Bert’s project is about dog behavior with the family’s dog as his subject. His twin, Nan, is also studying animal behavior, but with a chicken named Zelda. Because the science fair is open to both middle school and elementary school kids, the younger twins, Freddie and Flossie, can also enter. Freddie is entering with a large baking soda volcano.

When the kids arrive to drop off their projects, Nan and Bert notice another boy from their class, Martin Crane. Martin is a science whiz, but he isn’t very nice. He’s not really a bully, like Danny Rugg, but he makes fun of the Bobbseys’ science projects. They don’t know what Martin’s project is because he’s bringing it in boxes labeled “Top Secret”, but he swears that it’s going to win first prize.

When Freddie sees the other students’ projects, he starts to doubt that he has any chance of winning a prize himself. There’s a boy who has an impressive star chart display, and Danny Rugg has a display of spiders. There’s a girl named Ellen with an exhibit showing how pearls are made, including real pearls! Ellen says that her uncle is in the jewelry business and loaned her the pearls. Ellen’s younger sister, Melissa, says that Ellen’s project is unfair, although she doesn’t say why she thinks so. Melissa says that she didn’t do a project herself because she thinks the science fair is dumb.

Mr. Newman, Nan and Bert’s science teacher from an earlier book in the series, is one of the judges of the science fair. He’s going around the fair, taking pictures of the projects, but Martin refuses to unpack his project, saying that he will reveal it tomorrow. Then, Melissa screams that Danny’s poisonous spiders have escaped, and people start panicking and running! Mr. Newman says that Danny’s spiders are definitely not the poisonous kind, and he makes Danny apologize for telling people they were. The Bobbseys wonder if Danny could have let the spiders loose on purpose as one of his pranks. Then, suddenly, Ellen screams that her pearls are gone!

While the teachers are looking for the pearls and trying to encourage the thief to come forward, other accidents happen to other science fair projects. Freddie’s volcano suddenly erupts even though he didn’t set it up to do that yet. Someone cuts the leash on their dog, so he gets loose, and release’s Nan’s chicken from her cage. Ellen said that the pearls in her collection were valuable, so the teachers call the police. But, were the pearls stolen because they were valuable or because someone wants to sabotage the science fair? Was the theft of the pearls related to the sabotage of the other projects, or are these two separate acts? Also, what does Martin have in those boxes labeled “Top Secret”?

The book is available to borrow and read for free online through Internet Archive.

My Reaction

Sean and I were talking earlier about how later books in the New Bobbsey Twins series focused more on the younger set of twins, Freddie and Flossie, and seemed to involve lower stakes in the mysteries. I reviewed this book shortly after The Clue in the Classroom, so I could compare two science-based mysteries that took place at the kids’ school, one earlier in the series and one later.

The other science-based mystery in the series involved an invention and industrial espionage, while this one involves the school science fair. However, I thought the mystery was well-done. When the Bobbseys arrive at the science fair, the story establishes multiples suspects. Danny Rugg is a repeat suspect because he’s the school bully and general nemesis, and he could have set his spiders loose as a distraction while he took the pearls and set up other things to go wrong. Then again, Melissa seemed upset about her sister’s project, so she might have had a reason to sabotage it. Martin is being mysterious about his science fair project, but what if he doesn’t actually have one in those boxes of his? Maybe he couldn’t think of anything or ran out of time to do his project, so he’s sabotaging everyone else’s project to provide a reason for why his project will suddenly disappear or turn out not to work. I even had a theory that each of those people might have done something since multiple disasters happened at the same time or almost at the same time. From the beginning, there are multiple possibilities that seem about equally likely, which is good for making readers wonder, and the kids are active investigators in the story, investigating suspects individually, not just waiting for chance to give them the answers. Those are the ingredients for a good mystery.

Although the story takes place at a kids’ science fair, there are a couple of factors involved that add some excitement and higher stakes to the story. The value of the pearls has the adults worried about getting them back. (Personally, I wondered about just how valuable the pearls were. Since they didn’t seem to have any form of security to protect them, like a locked display case, and since Danny Rugg lied to everyone about his spiders being poisonous, it occurred to me that Ellen might have lied to everyone about the value of the pearls to make her project seem more exciting, although that is never clarified during the story.) I also appreciated the thief’s motive for stealing the pearls because it wasn’t just about the pearls’ value. It was one of the ideas that I can for a possible motive, but I’ll leave it a secret about which of my theories was right.