Here is a quick summary :
National Museum, Cardiff, St Fagan's, Big Pit, National Wool Museum, National Roman Legion Museum, Slate Museum and Waterfront Museum, Swansea.
They all have events running this week, and the details can be found on their website.
Caldicot Castle has a Medieval Mayhem workshop this afternoon, from 2 - 4pm, and some spooky Halloween events on Friday 31st. More details here
Caerphilly Castle has some Big Draw linked events running this week, and Tintern Abbey has a "Guided Tour with Brother Thomas". More details here
Cardiff Castle is running Big Draw linked events today and tomorrow. See here
Find out more about the Gunpowder Plot at Llancaiach Fawr all week, and on Friday, take part in a children's Halloween party. More details here
For the wannabe cheerleaders amongst us, there is a High School Musical Cheerleader party tomorrow (28th) at the Red Dragon Centre, Cardiff Bay.
Have fun.
If you know of any other events that we might all enjoy, please leave details in the comments.

