If you are looking for something fun for your au pair and child to do together sign up for a Kinder Music class. Both my children have taken classes and loved it. Kinder Music with Joy is a great resource. They offer classes in Overland Park,KS and Brookside, MO Here is a link to their website
This is a great way for your aupair to learn English by singing with your child. Music has no language barriers and is a great way for your child and Aupair to bond.