I have twins aged 10, and my baby is 9 months, atm she isnt walking so we do lots of things with the boys, and take her along anyway, they undertand stopping and feeding etc, and get involved, we just came back from a haven holiday, which was exhausting but the kids enjoyed it, it will be so much easier next year when she is walking, we go over the park with the ball etc on a nice day, we take the multi gym and lay her under it, and put a blanket over and she has a nap to. we tyake picnic etc