Madatech is a Science Museum, located in the Heart of Haifa. It's a pretty decent Science Museum (and we have seen MANY Science Museums in the past 17 years!), and all of my kids (aged 8-17) found things that interested them and kept them busy for our whole day there!
Normally, it's pretty pricey to take a family to Madatech (base price is 340 shekels for a family of 4, and each additional child is 50 shekels), so naturally, when we found out it was free on Wednesdays in February and March, we took a day to go. I wholeheartedly recommend you find a way to go too.
And now, Free Admission is back! Wednesdays in May and part of June are FREE ADMISSION days at Madatech! The deal is good thru June 15, 2016. Free admission is not valid for school groups or other large groups.
Please be aware that on Yom Hazikaron (Wednesday, May 11, 2016) the museum will be CLOSED so please do not plan to go that day; you'll just be disappointed.
Opening hours on Wednesday are 10am - 3pm, so plan accordingly!