I got the stroller kind and used it from newborn as the seats layed flat. Fits through a standard door and only weighs about 8kg if that. It cost about $220 from a baby store but was worth it. Mine are now just over 3 and 14 months old and i'm still using it. Actually its the only way i can go out with both, because my toddler is a runner and my baby will climb out of anything that does not have an arm and shoulder harness.

http://forums.bellybelly.com.au/foru...08&ppuser=1739