A friend lent me a swing like : http://www.fisher-price.com/en_US/brands/babygear/products/My-Little-Snugapuppy-Cradle-n-Swing

She is due when my babies will be 8 months. At that point they will be too old for something like that right? I'm going to a consignment sale next weekend and not sure if I should look to pick one up or know we'd be done by 8 months anyway.