Visitors of all ages are invited to discover solutions to science and engineering challenges at Science Saturday. This week, learn how invisible magnetic fields can be used in many ways. Build a magnet toy and tinker with the force! Activities are included in regular admission and free for Hagley members. This is a drop-in activity located in Hagley’s Power Plant, feel free to join the fun at any time from 12 to 4 p.m. Use Hagley’s main entrance off Route 141 in Wilmington, Delaware. Science Saturday is presented by Young Conaway Stargatt & Taylor, LLP.