This is my four-month old in his Bumbo seat.
Bumbo seats are relatively new (about 5 years, I’d guess) and are now available at major retail stores. It’s a step between the inclined positioning of a bouncy seat and the more independent sitting in a boppy.
from www.bumbobabyseat.com :
The Bumbo Baby Seat is a snug and cozy environment for [...]