5-in-1 Convertible Feeding ChairDine in style! The 5 in 1 Convertible Feeding Chair is designed to grow with your child as it converts from a highchair to booster seat and toddler chair. With its multifunctional design, your baby can use it from 6 months up to 4+ years of age! Now you can rest assured knowing your little one is secure and comfortable at the dining table no matter their age. 5 in 1 Convertible Feeding Chair has the options to convert: 1. Infant Toddler High Chair 2.