PROVIDENCE CHILDREN’S MUSEUMIn “Water Ways,’’ children explore fluid dynamics - how water moves - by watching it, touching it, and redirecting it. They can tumble boats and balls down the waterfall, build mazes to channel the flow, and construct fountain systems. Tue-Sun 9 a.m.-6 p.m. Free-$8.50. 100 South St., Providence. 401-273-5437, www.childrenmuseum.org