Someone nasty lives up the road - a boy called Tarquin - and he's been invited over to play by Josh and Danny's mum. The twins know that their day is going to be a nightmare but when they accidently get turned into ants the situation isn't just bad it's deadly.

Petty Potts has some bottles of frog and newt SWITCH spray in her raincoat and she's not afraid to use them! Now, if only she could remember where the antidote was! Join Danny, Josh, and new friend Charlie on two fiendishly fun, amphibious adventures!

Josh loves bugs. Danny loathes them. But after a run in with Petty Potts (a crazy scientist with an extraordinary serum) the twins find themselves with eight legs and the ability to shoot webbing out of their bums! If Josh and Danny are ever going to be switched back into boys they'll need to survive an afternoon in their back garden first.

Josh and Danny are at the zoo with Petty Potts to try out an amazing spray that can turn them into anacondas! But when Petty wanders off, the twins soon realise that, as two snakes on the loose, they are in danger of being put in a cage with other anacondas. And when they SWITCH back into boys they turn into a tasty snake snack!