A notoriously scary ghost is supposed to haunt the ruined medieval castle where Sunny and his friends are spending the day. But when a troubling visitor arrives at the antique shop, it turns out the danger is closer to home than they thought . . .

On the hottest day of the year, Ana Sharma and her mum check in to the Hotel Splendid, a place where bells seem to ring all by themselves, jam pots and milk jugs appear on the breakfast table as if by magic, and things go bump in the night. The Hotel Splendid has a problem. When Ana and Sunny meet, they come up with a solution, but one problem leads to another. Meanwhile, the hotel is harbouring an unexpected guest …

Surprise! Mad scientist Petty Potts is the new counselor at Josh and Danny's summer camp. And she just happens to be hiding some bottles of her extraordinary serum inside her raincoat. Now she can turn the boys into amphibians!Josh and Danny vow to stay away from Petty's S.W.I.T.C.H. formula, but when their new friend Charlie gets into trouble, they know there's only one option: find Petty and get hopping!

The mad scientist Petty Potts has a crazy new formula—a spray that can turn Josh and Danny into lizards! The boys immediately give themselves a spritz and whizz up the nearest tree. But soon, they find themselves in deep doo-doo and surrounded by owls that eye them as snacks. Will Josh and Danny make it out in time?

Danny and Josh are trying their best to stay away from Petty Potts. They don't want anything to do with her crazy top-secret experiments, and they certainly don't want to get turned into bugs again! But when their mom's garden is ruined the day before the big neighborhood competition, the twins turn into bluebottle houseflies to take matters into their own two hands...or rather, into their six legs. Can they act like flies on the wall and find the culprits before it's too late?

Petty Potts has been kidnapped! Josh and Danny have to find her before it's too late. While investigating, the boys come across Petty's latest S.W.I.T.C.H. spray that can turn them into alligators. Josh and Danny soon have a date with destiny…

Josh and Danny are stuck in Princess Land—a store full of pink toys and worse: actual girls! To avoid security guards and screeching girls, the twins try a quick spritz of the infamous S.W.I.T.C.H. formula. But the spray only half-works! They are stuck with the head of a lizard and the body of a boy. Then their situation takes a nasty turn...

Danny and Josh thought that today would be just like any other school day—wake up, eat breakfast, and go to school. Of course, they didn't expect to accidentally turn into grasshoppers in the middle of class! Can they avoid being eaten while they search for the antidote? Will they be able to change back before getting a week of detention? And will they find time to eat those delicious-looking leaves?

Summer camp was going great for Josh and Danny until mad scientist Petty Potts showed up. Sure, her serum turned them into frogs to help them save their new friend Charlie. But the serum didn't completely wear off: all three kids still have frog feet!They are running out of time to find right antidote before their parents show up. Their best option is to ask Petty to use her S.W.I.T.C.H. formula again. But of course, things don't turn out quite as planned. Do two frogs and a newt st...

All Josh and Danny Phillips want to do is play in the yard with their dog, like regular eight-year-olds. Unfortunately, their crazy neighbor Miss Potts makes sure that they never have any fun. When the boys accidentally stumble on Miss Potts's secret—that she is working on experiments that change people into bugs—they find themselves in a whole lot of trouble. (They also find themselves with six more legs than normal.) Can the boys survive in the world as spiders? And more important, will ...

Petty Potts, scientist extraordinaire, is losing her touch. The S.W.I.T.C.H. spray that's supposed to turn Josh and Danny into chameleons refuses to work. But the next day at school, the twins suddenly find themselves transformed. Looks like Petty's spray has worked after all! But it shows no sign of wearing off any time soon...

When Petty Potts turns up on the beach, Josh and Danny decide to "borrow" her new S.W.I.T.C.H. spray—the formula that will turn them into turtles! A squirt and a spritz later, the boys cut loose completely, diving through the waves and slurping on jellyfish…until they swim into serious danger.