Choreographed roller-skating babies dance to the re-mixed street sound of The Sugar Hill Gang's "Rapper's Delight".We were involved from pre-production, creating pre-vis based on the supplied story board to aid the development of the scenes. Early testing researched the best way to integrate 2D and 3D techniques to create the young skaters, who needed to act like adults, yet keep the babies' personalities. To do this, the VFX team opted to combine live action heads with the CG bodies. To make this happen, a total of 134 babies were filmed, and their heads were matched to 3D animatics displaying the baby like body behaviour.The team of animators used Autodesk Maya to create the baby skaters' bodies. To ensure the babies appear fully realistic, it was important to carefully match movements, paying special attention to interaction between the shoulders, neck and head. To help achieve this, full CG babies were created and their heads were replaced later by the live action versions from the shoot. Creating the babies in full made sure the newly positioned heads would follow the shoulder movement naturally.