Just thought of another one, thanks to an email popping into my box: there's a Yahoo Group called 'Moms-in-Vaud' which meets up at least once a week for coffee and play in different places locally. You have to join Yahoo Groups if you haven't already, then sign up for membership of the Moms-in-Vaud group (and the 'Expat Moms in Switzerland' and 'Lausanne Kids' ones are interesting and active too).

Here's a link to the Moms-in-Vaud one: http://groups.yahoo.com/group/moms-in-vaud/. The meet-ups are more Rolle direction, but that's only 15 mins from Morges so might do for you.

kodokan