what to get my brother and sister and their wife/husband for Christmas?

i dont know them that well

It's totally good enough.

Probably depends on the ages of their kids. Theater tix aren't of much use to parents with very young children (as they'll have to pay for a babysitter to be able to use them). Gift cards for local restaurants that cater to families might be better.

nnaybe you should get thenn a nice puppy fronn the petstore, they will love that

You could offer free babysitting services, while it wouldn't cost you anything, be far more valuable to them. Or maybe a personalized welcome mat. That way they will think of you every time they come home.

I made gift baskets for my brothers and their wives.

A popcorn bowl with microwave popcorn, some salts for it, candy, some wine, gift card to a local movie theater, a giftcard to a restaurant and a few other things in there. Aside from the gift cards and liquor items everything else came from the dollar tree (including the popcorn bowl). I had also gotten them individual things.

I did similar ones for my nieces & nephews just catered to their interests. They all got gift cards to an indoor water park, some of them got ones to an indoor trampoline place, movies, pottery painting, basically things they like to do and also candy, food gift cards, etc. I bought them other gifts too.

Make a basket for the whole family

instead of a giftcard to a theatre, get a family DVD and fill the basket with goodies & drinks, if you want to expand it, fleecy blankets are cheap, and fluffy socks, make it a night in hamper, they can cosy down and watch the movies