Engineering Challenge:Can you build a car, powered by gravity, that can travel at least 100 cm without turning?Materials: (per classroom)Cardboard sheets and/or empty cardboard tubesStraws Assorted Scrap PaperMisc. craft items (beads, buttons, pipe c
                
                 
                    
                     
                 
                                     
                                     
                                     
                                     
                                     
                                     
                                             
                                             
                                             
                                             
                                             
                                             
                                             
                                             
                                             
                                             
                                             
                                             
                                             
                                             
                                             
                                             
                                            