Hello,
We have eaten at inventions twice and the princess meal once with our DD who is under three. Like previous poster said they will eat for free at inventions. When we ate at auberge DD had the choice of pasta or chips at no charge. This has been a hit and miss though people being told they have also got it for free others being said they have been charged it seems to be up to the CM that serves you.
Oh and we got discount at both meals.