The front and back seats can hold kids up to 50lbs each. Versatile Stroller : 5 modes of use to accommodate your growing family: 1 car seat travel system mode; 2 car seat in the front seat with sibling on platform; 3 child in the stroller seat only; 4 child in the stroller seat with sibling sitting on bench; 5 child in the stroller seat with sibling standing.