Now that school is open, it's not very crowded at all and would be a great time to see if your little ones enjoy it. Kids 2 and under are free, and adults are $7. If you decide to buy a membership the day of your visit (after you've had a chance to check it out), you can apply the $7 to it. That's what I did.
They open at 10 AM during the week, and are closed on Mondays. I have a 2.5 year old that is in school MWF, and a 14 month old that is home everyday. Would love to meet some of you there sometime! My little one has a Little Gym class on Wednesday mornings, but Tuesdays and most Thursdays work great for us. Fridays are okay too.