For children between 5–10 years of age with zone II flexor tendon lacerations, the literature recommends a modified early mobilization programme under the supervision of a hand therapist but the fingers are immobilized between physiotherapy sessions. We report on a series of children between 5–10 years of age with flexor tendon lacerations (n = 54 fingers) in zone II repaired with a six-strand core suture (three separate ‘figure of eight’ sutures) and actively mobilized immediately after surgery similar to adult rehabilitation programmes with no immobilization between the physiotherapy sessions. The average follow-up for the study group was 13 months (range 7–25 months). There were no ruptures. The final outcome was excellent in 46 fingers (85%) and good in the remaining eight fingers (15%) using the Strickland–Glogovac criteria.