When an ice cream truck is accidentally made invisible, Sparks' Crew has to rely on the sound of the truck's music to track and find it. Curriculum: Sounds can differ depending on how near or far they are and what direction the sounds are coming from. / When a flying super-glue-gadget goes haywire, people everywhere are getting stuck! Only the light beam from an unsticky gadget can free them...but that gadget is stuck too! How will Sparks' Crew move the light beam to help unstick everyone? Curriculum: When a beam of light hits a smooth, shiny surface, it changes direction and the beam shines somewhere else.