DD1 (7) - 50", 49 lbs, Frontier 85, still in 5 pt harness and loving it
DD2 (3) - 38", 30 lbs, Marathon 70, 5 pt harness, forward facing
Back-up seat for DD1 is a Harmony backless booster.
Grandma has a Graco Nautilus that used to be DD1's that I guess DD2 can use now, but the kids riding in grandma's car scenario does not happen very often (hadn't since DD2's birth, anyway!).