The Original Jolly Jumper is a training device for every child in the pre-run phase. Babies will enjoy bouncing around and giggling as they develop rhythm and improve their balance. Babys muscles are strengthened and coordination is further developed as they drift around. The Original Jolly Jumper supports your babys spine so that bones develop well and keep the posture upright. Provides fun and exercise while giving your baby the skills they need to develop. The jumper is secure and hangs securely on any door frame with the included door clamp. Babies can use their Jolly Jumper Exerciser after 3 months (only if the baby can hold the head with full neck support) to age with the maximum weight of the baby of 13 kg.