We did this with Justin about 6 weeks ago and it's been awesome. I thought it would be a lot more mess and trouble, but he is actually less messy now that we've done it!
We use the Fisher Price Healthy Care seat, but without the tray. It's like this one: http://www.toysrus.com/product/index.jsp?productId=2861764
We had one similar to this one for Ryleigh. We used it up until she was around 4 1/2. I definitely noticed a difference in her eating, couldn't hurt to give it a shot!
pinkylu:We used the FP space saver chair for Adah and removed the tray months ago to let her eat with a plate at the table. There is a really cheap booster seat at Target for only $12. It has straps to hold in the child and to strap it to the chair. We use it when other kids visit and when we go to someone else's house.
This exactly! Well, we bought our cheap booster seat at Meijer, but same idea. Allison is more confined in the FP chair so she does better in that, but it's nice to have the other chair to keep in the car.