My son absolutely loves to stand and bounce so I want to get him a jumper (like an ExerSaucer, not the kind that hangs in a doorway) but his legs are still pretty short and I'm worried he won't be able to reach the ground. Does anyone know of any jumpers that work well for shorter babies, or have any tricks to make it work if his feet don't reach? I'm not exactly sure how tall he is now..he was 22 inches a month ago and it doesn't seem like he's gotten much taller since then, so maybe 23-24 inches.