Topsy and Tim (2013)

Season 1: Episode 7

Tim makes a marble run with the help of his friend Tony Welch. When Topsy's friend Vinda admires the boys' work, Topsy suggests the girls make a marble run of their own, using the contents of the recycling box. The girls' marble run looks impressive, but Tim thinks he knows how they can all work together to make the best marble run ever.