Where do I enter expenses I incurred to take the kids in my day home on outings? For example, movie tickets, mini golf, etc.

In the "Other Expenses" line with a description as "entertainment", under the Expenses (enter business part only) section of the Self-Employment Profile.  

Note: In case the CRA wants to know more about your home daycare, you want to make sure you keep accurate records and all receipts pertaining to anything you are claiming.