Abstract: A writing instrument includes a barrel, a refill assembly, and a refill plug assembly that is quick to release from the barrel and quick to re-attach to the barrel when changing a refill assembly. The refill plug assembly is quickly secured to the barrel of the writing instrument and quickly released from the barrel of the writing instrument through a twisting and/or pushing action that may require less than one full turn to disengage from the barrel and to re-attach to the barrel, thus expediting replacement of the refill assembly.

Abstract: A stroller has a seat assembly with a seat bottom and a seat back that is movable from an upright in-use orientation to a forward folded orientation closer to the seat bottom. A structure such as an arm bar extends across the seat assembly above the seat bottom and in front of the seat back. The structure is in a raised in-use position with the seat back in the in-use orientation. The structure moves from the in-use position to a lowered stowed position closer to the seat bottom when the seat back is moved to the folded forward orientation.

Abstract: A stroller seat assembly has a seat bottom with a forward end and a rear end. A calf support is pivotally connected to the seat bottom adjacent the forward end and is pivotable between a lowered position and a raised position. A lock mechanism can, in a locked arrangement, retain the calf support in a selected one of the raised and lowered positions. A release actuator is actuable between a locked position associated with the locked arrangement and a released position that reconfigures the lock mechanism to a released arrangement. The release actuator is gripped and released by one hand of a user whereby the calf support is selectively pivotable toward either of the raised and lowered positions by the same hand.

Abstract: A writing instrument includes a shell, an ink reservoir disposed in the shell and a writing tip section that is provided on the shell from which ink from the ink reservoir is applied to a substrate. The writing tip section includes a writing tip and an ink feed assembly for delivering ink from the ink reservoir to the writing tip through capillary action. The writing tip is flexible and a flexible cover with the shape of a fountain pen nib is provided for supporting the flexible writing tip.