Find Baby Strollers at Target.com! Make your wish for the ideal stroller come true with the Book Pop-Up! This three piece system was named after the unique folding and opening (pop-up) motion the bassinet undertakes, which allows it to be folded completely flat, while still being attached to the chassis. Equipped with a premium chassis, folding bassinet and reversible seat, the Book Pop-Up offers the ultimate in style, comfort and mobility. The Book Pop-Up chassis can accept the Seat Pop-Up, Bassinet Pop-Up or Primo Viaggio infant car seat directly onto its frame. It folds inward, "like a book" with just one hand and is equipped with an adjustable handlebar. Color: Grey Graphic. Gender: Unisex.