Lexa Hoffman, 5, of Salem, smiles as she comes out of a channel filled with cornstarch and water,

Lexa Hoffman, 5, of Salem, smiles as she comes out of a channel filled with cornstarch and water, where children could “walk on water” during Silly Science Sunday at the OH WOW! children’s center in downtown Youngstown. The cornstarch and water solidify when pressure is applied.

About 3,000 children and adults attended.