Can anyone recommend a pushchair for babies of the same age. They are not actually twins but cousins who are 6 weeks apart who will be looked after by my mum (their gran) 1 day a week. We are looking for a tandem pushchair for her to have at her house. Doesn't need to be a travel system but comfortable enough for 2 to sleep in. They are 7 and 9 months old and we'd like one to last until they are around 2.