Travel/Hook-on Chairs: Travel high chairs, also known as hook-on high chairs, are perfect for families who travel often, or need to conserve space in their home. These high chairs are lightweight and work by clamping onto the table. While lighter and smaller, it is important to understand the limitations of this chair is based on the stability and strength of the table being used. Always ensure that you use a solid, strong, and flat table that does not wobble.