Let me just list a few of the obstacles related to Shabbat (and these are only the ones I've thought of so far, without kiddos and real-world experience):
- Saturday bio-family visits
- Weekend roadtrips
- Saturday classmate birthday parties
- Friday night bedtime
- Missed placement calls
- Needing Sundays for errands (or for church) means fewer Sunday day trips (museums! apple picking! My Mom and My Dad's house!)
- No more "oops I don't have food for Shabbes, guess I'll have pita and grape juice tonight" Friday afternoons
- To take the kiddo to shul, or not to take the kiddo to shul, and the consequences
- Explaining why we can't watch TV one day a week
- Explaining why "no, I can't make you [insert food item] today"
There's not one simple answer that makes all of the obstacles go away. But the opportunity to think about them and strategize is part of what makes this a rich experience. And thinking about it in advance will smooth the transition for the kiddos. Now, if only I could remember to plan food for Shabbat in advance, I'll be well on my way...