I just picked up a kitchen scale with good reviews. He has outgrown the platform, but I just put a paper plate on it and zero it out before weighing him. When he gets a bit bigger I will find a larger container. Make sure whatever you wind up with has the tare feature, so that you can put a container on it and set it back to zero for an accurate reading. I mean, you could always weight the container and subtract that from the total, but I love the zero feature.