A convertible soothing seat for an infant is provided. The convertible soothing seat can include a support frame and a seat portion pivotably connected to the support frame. The seat portion can actuate between a soothing configuration and a sleep-safe configuration, and can include a retractable harness. The retractable harness can cover a portion of the seat portion in a covering position when the seat portion is in the soothing configuration and can retract to a retracted position wherein the retractable harness does not cover the portion of the seat portion when the seat portion is in the sleep-safe configuration, and the retractable harness can retract in response to the actuation of the seat portion from the soothing configuration to the sleep-safe configuration.

A system, method and/or kit for assembling multiple different children's accessories using shared or modular components or parts to assembly multiple different accessory modalities or configurations. In example embodiments, the multiple different accessory modalities or configurations may include one or more of a gym or play mat, a play gym, an activity jumper, an activity center, a play table, and/or a playhouse.

A connecting device for a child carrier, a child carrier and a child crib are provided. The child carrier includes a carrier body and an accessory, the carrier body including at least one first rod, the accessory including at least one second rod. The connecting device is configured to connect the accessory to the carrier body and includes: a fixing base connected to the second rod and configured to accommodate the first rod; an operating member slidably connected to the fixing base; and an engaging member connected to the operating member. The sliding of the operating member along the fixing base is capable of driving the engaging member to be switched between a locking position and an unlocking position.