For some this may be over stimulating, but for our lo after about an hour of awake time we place her in her crib, turn on her mobile and baby Einstein music thingy (not sure exactly what it's called, but it plays music and the fish move around and lights turn on and off). She will stare at it until it turns off about 12 minutes later. I think because she is able to kick and move about she works out all her left over energy and doesn't feel the need to do it as much when she is trying to settle in for a nap. At that time I pick her up and start setting the scene for bedtime and start the nap time routine (turn on ocean sounds, turn off the lights, diaper change, swaddle).
I hope this helps.
Melissa