Planning a day out at the science museum on my own with DC in half term. They are 5 and 4 and we do not have a pushchair. Every time we go to London they get so tired walking around/tubes etc. can I take my beach buggy and when they've had enough I can push them around in it? It folds down and is on wheels so I can carry it when going on tubes etc. not sure if a it looks really silly and will be more faff than it's worth. Wwyd?