Spectacular Shenanigans

Three sensible siblings accidentally wander into the woods near their home.  They stumble upon a magical circus filled with spectacular events and special characters.  The children are allowed to participate in the Big Top show and must decide what skill they will exhibit.  Deciding between lion taming, stilt walking, trapeze flying, and many other choices is difficult.  Which one will each child choose?  And what exactly is a shenanigan?