i have my jolly jumper arriving tomorrow and can't wait to put hollie in it. She is 3 months old and has been very strong from birth. I think if you have a floppy wobble head baby then they are probably not ready for it, but if you have a strong baby that holds their head up with ease then you could give it a try. Hollie has been in the hugabub facing outwards since 2 months and has no problem holding her head while being upright for any length of time. I can't wait to see her in it.