The mucogingival lesions in children may be due disruption of the balance between bacterial challenge and host response. This disruption may be associated or not to some mucogingival deformities. What characterize the periodontium of children is the immaturity, the lack of attached gingiva which increase by time and its susceptibility to resorption. In this manuscript, two clinical cases will be presented, the first case is about the excision of superior labial frenulum that block the closure of the diastema between 11 and 22 followed by free gingival graft: the donor site was maxillary buccal attached gingiva between the lateral incisor and the canine. Free gingival graft was also performed in the second case for the treatment of recession RT2 on the left mandibular lateral incisor, the donor site was the palate. Total excision of frenulum plus sufficient height of attached gingiva in the first case, the closure of diastema was uneventful. Important but non full coverage of recession was obtained after surgery in the second case with a significant increase in attached gingiva. creeping attachment, coronal migration of the epithelium plus full coverage was reached at 15 months post-operative. Maintaining a good oral hygiene plus early discovery of mucogingival deformities are the keystone to preserve a healthy periodontium from young age. Once the mucogingival surgery is indicated for children, it is mandatory to put in consideration the particularity of tissue working on and the repercussion of the intervention on the growing periodontium.