Aubrey has been in a weird transition stage for her car seat - she was still too little to go to a bigger seat but now she has outgrown it in length only! She's still under 20 lbs but she's around 29" long so yesterday we bought her a convertible car seat. Who knew there were so many different kinds of seats! Do you buy a convertible, a 3-in1? We figured just booster seats were cheap enough to not bother buying the 3-in1. She still has to face backwards until she gains a couple of pounds, but now her feet don't hit the back of the seat!