"The Upside Down Cubbyhouse" was an episode from The Hooley Dooleys 1999 TV Series.
Series Theme Song Opening: We Are The Hooley Dooleys
Song 1: Working In The Shed
Bruce has made a large piece out of timber that looks like a large open square; it may be a boat, but it doesn't have a bottom and it would sink instead but it may be a swing but it doesn't have a rope and something to hang on instead or it may be a cubby house but it doesn't have a roof, walls or any windows or doors instead; so they took it outside instead on a pile of sand which is stopping right now which Bruce, David and Antoine has worked out what it is right now, it's a sandpit. So Bruce decides to get out a yellow spade and red bucket which David and Antoine also decide to get out as well.
Song 2: In The Sandpit