The sixth season of La Voz Kids premiered on 7 May 2021 on Antena 3. David Bisbal, Rosario Flores, Vanesa MartÃÂn and Melendi remained as the coaches of the show. Eva González and Juanra Bonet also returned for their second season as hosts.
Levi DÃÂaz from Team Melendi was announced the winner, marking Melendi's second and last victory as a coach.
In this season, Rosario Flores, Melendi, Vanesa Martin and David Bisbal are returning coaches from the previous season. However, Eva González remains the main host of the program together with Juanra Bonet who serves as backstage host,.
Also, the coaches' mentors changed in this season. Bisbal's team adviser would be Aitana, Beret for team Melendi, Blas Cantó for Team Vanesa, and Rozalén for team Rosario.
Blind auditions started on 7 May. Each coach is given two blocks to prevent another coach in getting the contestant to its team and; when the coach is blocked, the chair won't turn around. At the end of the blind auditions, Vanesa Martin didn't use her second block.
The battles round started on 18 June. The coaches can steal one losing artist from other coaches. In addition, coaches' advisors help them on deciding who will be advancing to the next round; Aitana for Team David Bisbal, Rozalén for Team Rosario, Blas Cantó for Team Vanesa and Beret for Team Melendi. Contestants who won their battle or were stolen by another coach advanced to the Knockouts.
The knockouts round aired on 9 July. Known as "El Ultimo Asalto" in Spanish, in this round each teams' six participants perform, and the coaches select only four to advance for the semi-final. The advisors from the battles continued to help the coaches in their choices. In this round, Rosario Flores and Melendi switched chairs, with Beret temporarily sitting on Melendi's chair giving comments.
After this round, the public was decided the winner of medium elections. The Major decides Levi like the winner.