Tired Baby or Bad Parenting?

Owen just loves hanging out in the doorway jumper. It's fun to watch him bounce around and get a better sense of his body balance. I enjoy checking him out when he doesn't know that I'm watching. Every time he caught my glance he would give me a giggle or huge smile. He was having such a good time today that he wore himself out and fell asleep. Are we terrible parents for letting this happen? Don't you just love how this photo shows off his adorable, chubby thunder thighs? There is just something about baby fat that is so irresistibly cute!