Thinking of buying a baby bounce or exersaucer?

My daughter is 5 months and can not sit on her own yet. I've been looking around to get her a baby exersaucer but the label says that she needs to be able to sit on her own to use this. Is there another product I can get which is similar to an exersaucer. I already have a playmat and bouncer for her and I don't want a swing. Any other suggestion?