1. Fisher Price Rain Forest Jumperoo - my baby used it from 4 months to around 8 months. She really liked it. She's got strong legs from jumping in there LOL
2. Car Seat - Graco Keyfit
3. Stroller - I prefer Baby Jogger City Mini, it is light weight and very durable.
4. High Chair - I have the expensive Ingesina one. It looks great but I found it is not as practical as the cheaper ones. There is a gap between the baby and the tray so food always gets on her lap and floor. I'd suggest you get the traditional cheaper ones from Fisher Price or Graco.