when you see your baby is taking a long time to fall asleep in one of the nap, usually the afternoon then you will know that he/she is ready to give up one of the two naps. around 12 months my son gave up his afternoon nap and moved his morning nap from 9.30 to 11.30 and sleep till 2.30-3pm. His bed time is 7.30-8.00 till 7am, occassionaly waking up at 6-630 for milk and i did not let him.
routine for my son at around 14 months:
7-7.30am - milk
8-8.30am - breakfast
8.30-10am - play time example walking at the park, reading, playing balls, go to supermarket get him to look at differentstuff, meet his little friends to play,etc.
10.30-11 - lunch
11-11-30 bath and nap
3-3.30 - snacks like fruit and cheese or crackers and juice/water
4-5.30 - play time usually to the park or club house
5.30-6pm - rest at home
6-7 - lunch and bath
7pm - reading at room
7.30pm - sleep
I only send him to playgroup when he turned 1.5 year old. Until now he is 26 months, he still go to playgroup once a week. we do a lot of reading and playing at home and every evening, run at the park with his little friends. If rain, he said "mommy, it is wet, let us go home". so he is ok with either going out or stay put at home the whole day.