I think there are some general grandparenting courses that focus primarily on first aid and things that may have changed since the GPs had their children - safe sleeping guidelines and feeding guidelines (i.e. for babies), for example.
I think these are helpful, simply because some of the guidelines have been updated. For example, back in the day many mums were told to feed their babies only every 4 hours and to put them to sleep on their tummies to prevent reflux. We now know that babies should be fed on demand and that it is not unusual for them to need to be fed every hour, at least at first. We also know that putting babies to sleep on their backs lowers the risk of SIDS.
sticky labels on apples - remove before washing!
Bought the wrong Hot Cross Buns 😩