Enjoy the forest preserve while you're there if you want to make a day of it.
Discounts on Tuesdays; seniors also discounted admission after 2pm
This museum has added a new exhibit that we haven't had a chance to visit yet "Animal Architects." It goes through February 21, 2010. The website says kids can crawl through a beaver lodge, try building a nest, and look at live insects building homes together.
Tuesdays are discount days where kids get in free and adults are just $3. That's when I'd recommend going, as I don't feel it's worth the regular admission price (though the website does offer a $1 off coupon if Tuesdays don't work for you).
If it's a nice day, you can enjoy a picnic at the adjacent Lakewood Forest Preserve.
The Lake County Discovery Museum tries really hard to be something more than it currently is for families. And for that I am grateful. It's really close, included in our reciprocal membership and offers lots of activities throughout the year.
The last time we were there we only stayed for a couple of hours but the kids had a good time pretending, even in the history section, which I would've thought they'd be bored in.
The new exhibit just opened and we'll be going soon to see it: Prehistoric Lake County. I'll update once we've been there!