If you're local and have young children (ages 2-4), you can get a free Pre-K Membership to the Newport Aquarium, which includes unlimited visits for an entire year. The only catch is you have to register by March 3rd. See https://www.newportaquarium.com/aquarium-admission/annual-passes/pre-k/ for more info.

The limited supply of pre K passes seems a little fishy to me.  It seems they should give a number or offer one to all during the date window.