I think they are okay but I've noticed a lot of my friends using them all day long for young babies.. I don't think they are good if common sense is not applied. I guess its the same as those jumparoo things or a baby walker. If you overuse them, and don't give your baby opportunity to roll around on the floor or carry them about, they are missing vital opportunities to develop in so many ways. Just my opinion. I don't have one but I have used one. Dd escaped from it quickly lol.
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