We had a second hand rubber ring type baby nest from my sister in law, but it came without the original box or instructions (not that I expected it to!) so I don't know when I can start using it.

Sophie is 7 weeks old, but on the small side. She weighed 7lb 13 1/2 oz last Friday, so is probably over 8lb now. I know that things like sleeping bags and slings have minimum weight requirements, as I've had to wait to use them even though they say they're suitable from birth.

So.... does anyone know when I can start using the nest?

I think you can use them for babies that can't sit, but only partially filled with air. When they are close to sitting or sitting unaided, then you use it fully inflated. xx

is this similar to what you have?

http://www.mothercare.com/Early-Learning-Centre-sit-me-up-cosy/dp/B001CTFLVQ/sr=1-32/qid=1277375293/ref=sr_1_32/277-7524260-2891057?_encoding=UTF8&m=A2LBKNDJ2KZUGQ&n=44622031&mcb=core

if so we have one and Isabella loves it she's 2 weeks old and weighs 7lb 2