Lily has just turned 4 months and has changed so much in the last week. As a spirited baby she could only be awake for about an hour at a time as she got overstimulated, but now it's extended to nearly 2 hours and she's dropped 1 of her 4 naps. I have been researching activities to do with babies (the Mirium Stoppard book is brilliant) and do a variety of things with her e.g. looking at books, tummy-time, rattles/other toys she can grab and just chatting and laughing. My question is, do people spend ALL the A time WITH LO every cycle? If not, how much time does LO spend on her own and what does she do? I have a play gym for Lily which she sometimes goes on for about 5 minutes but that's all I've tried. I have 2 concerns, firstly that she is going to exhaust me! Secondly I may overstimulate her.. (By the way I am not counting the activities we do when we're out e.g. swimming, baby massage, movement group..)