I'd go horizontal too. Having said that my kid was a whale of a baby, 26lbs at 6 months. God knows how much he weighed when he got into that jumper. Money never better spent. He'd spend HOURS bouncing on that thing.... NAP....and then wake up drowsy with a few tiny bounces. Throw him a snack and hes good to go for more bouncing! Then he masters regular bouncing and advances to directional bouncing to hit the dog. Great days for you, dont miss a second unless you're napping. Long story long, we were dumb and young and we never reinforced any threshold