This article is from the Epilepsy FAQ, by Andrew Patrick (firstname.lastname@example.org) with numerous contributions by others.
Children are usually awakened by seizures that occur while they sleep.
Thus, a parent of a child with a known seizure disorder is usually
aware when their child has seizures during the night. Only in those
rare cases where a child vomits or experiences other problems during a
seizure is there a need to worry.