Hands-on Ideas to Explore, Construct, and Create. Help children become active learners as they experience, explore, and make discoveries in science or math. Science Tub Topics and Math Tub Topics contain discovery-based activities featuring whole-group, small-group, and partner instruction. Each activity also includes an independent 'tub topic" a hands-on activity that allows children to further investigate through the use of common materials that can be stored in a tub.