Were going through a bit of a rut at the moment as well.
We have 5DC DS22,DS20,DS17,DD15 and DD11.
For us most of the time it's because DD11 doesn't want to leave the house,she's autistic the same as her big brother DS17,she used to love to go out all of the time and we are an outdoorsy family really but for the past 18 months she constantly wants to stay home.
She goes to golf every Saturday(it's a group for children that have a disability)her Dad takes her and I get to go if it's a family session which is usually once a month.I took both of my DD's to town to do some fun shopping(buying things they want not what they need)and then we had lunch afterwards last Sunday and were going to do the same next Sunday except it will be the cinema and lunch out,DS17 went bowling with his Dad last Sunday whilst me and the girls were out,DS22 and DS20 are usually working or out with friends at the weekends.
My DH is going to take our 3 sons to play a game of golf next Sunday if the weather's okay whilst I'm out with our daughters.
When were stuck at home we tend to watch some tv,order a movie,have something really nice for lunch(I made homemade macaroni cheese and chocolate and banana cake today)either something home made or we'll buy some lunch deals for everyone or something of the hot counter from Morrisons and we'll play on the wii or xbox with our DC or play cards or some board games.
When we can get our DD to go out we either go to a National trust place(we have membership cards)a park,a drive out in the country side(I'll pack some flasks,1 with coffee and 2 with hot chocolate and I'll pack a hot picnic)swimming,bowling or to the cinema.
Sometimes we'll do art and crafts at home or make cakes and biscuits.
It all depends really,I can't wait for the nice weather to come back I think we'll be able to get her out more then.