Hi M.,
Well i quess it all depends on the baby. Every one is different, some get really bored at an early age and like the stimulation. Have you spoken to your pediatrician about this. Or maybe referred to a "what to expect " book. That can be helpful to. You"ll know if your baby isnt ready just by putting them in a saucer. I would go with a saucer 1st, then as he/she gets older swith to a walker. Of course they can't go far in a saucer and terrorize pets or tear down everything in sight! :) I don't agree with what is being said about walkers & it affecting the leg mucsles. BOTH of my daughters used them, and they have been absolutley fine!!
Have fun -- its great to watch them develop in to the wonderful little people they become!