The episode starts off with Spyler (who had a tennis ball head and button-shaped feet) and CeCe (who looked as though she was made of blocks) trying to find something to do. When they find something, they discover that they need different items. Duck arrives and gives Spyler and CeCe four (or sometimes three) items to find, which she says in a rhyme. Spyler and CeCe then start searching for the items. After each item is found they sing their "Whoop! We Found It!" song. Duck arrives again and tells them what they have found and what they need to find in rhyme. Spyler also calls for Wheeler to take their stuff home. After all the items are found, Spyler and CeCe do their activity/task. They always find a use for every item.
Spyler is one of the main characters in the cartoon I Spy. He is a plasticine model, similar to Wallace and Gromit, with a tennis ball head and buttons for feet. In every episode of I-Spy, Spyler and CeCe find four items that are in every riddle the Duck gives, thus beginning to play the game I spy. The items they find are used for a certain purpose, such as getting rid of CeCe's hiccups in "I Spy a Tick-illy Hiccup", or building a robot in "I Spy a Runaway Robot". While playing I spy, when they find an item Spyler and CeCe sing their "Found It" song. Sometimes, when they are carrying several large items like blankets, Spyler and CeCe call for Wheeler, their red truck, to carry these items. Also, they eat pie.
CeCe is Spyler's dog. Like Spyler, she is made of plasticine. She talks, like Spyler. She has jokes for Spyler when they are around things that are in the game and are not in the game and what they use for a purpose.