This event is in the "Children" group. Ramps & Rollers 6:30pm - 8:00pm Children This event is in the "Children" group. Dec 11 2018 Tue Ramps & Rollers 6:30pm - 8:00pm Please note you are looking at an event that has already happened. Library Branch: Woodridge Public Library Room: Meeting Room AB Age Group: Children Program Type: Event Details: Discover the concept of gravity, the properties of inclined planes, the resistance of friction, the application of simple machines to do work. Build simple or elaborate structures using this collection of handcrafted wooden bl