Moody Gardens Festival of Lights, it's on the west end of the Island, you can Google for directions. It's not hard to find. Galveston Brewing Co. is also in that direction and are both kid and pet friendly.
Go to The Strand tomorrow, two CCL ship arrive on Saturday plus you can do some tacky t-shirt shopping. There are some decent restaurants on Post Office Street (2 or so blocks south of the Strand). There are a couple of seafood places at Pier 21, Katies is my preference, not as touristy, but it's your vacation, eh.
A fan favourite of ours for breakfast is The Sunflower Bakery and Cafe on 14th Street, but it is pricey $$$, and usually a wait to be seated.
And if you have time, go to Pleasure Pier if it's open. It too can be pricey, and not all the rides are running, at least when we were there earlier this year and this month.
Sorry for the rush writing but off to do the dreaded Christmas shopping thing.