This high chair is adjustable, so it works as a standard full-size high chair, a booster seat which can be attached to a dining chair, and a toddler chair. All the convenience Its compact size and adjustable attachment strap system make it easy to securely attach Fisher-Price SpaceSaver High Chair to just about any kitchen or dining chair. Looking for the best high chair? Consumer Reports has honest ratings and reviews on high chairs from the unbiased experts you can trust. Find product information, ratings and reviews for Graco® DuoDiner 3-in-1 Convertible High Chair online on Target.com. .