This past weekend, I decided to see if Mackenzie would fit/enjoy her "big girl" stroller. We have the stroller frame that goes with the carrier, but we also have the regular stroller. We criss-crossed the straps for extra support since she's not sitting up on her own and went for a stroll. She looks really big in the stroller. I can't believe she's already 4 1/2 months. She really enjoyed being outside and talked a lot while we made the loop around the block.