Drop-in for an open session of imaginative construction with LEGO and DUPLO blocks. We supply the blocks so please leave yours at home -- just bring your imagination and start building! YOur creations must be left at the library but may be photographied before you leave. For children ages 3 to 12. Free. No registration. All children must be accompanied by an adult at all times. For more information call 240-777-0240.