Get started building chain reactions with these 5 pro tips! 1: Use two pieces of ribbon tied to supports to make a track for your ball. Place them close together, and make sure to pull them tight so the ball doesn’t fall through. 2: Drinking straws can turn any flat surface into a track. Stick them down with double-stick tape, about as far apart as your ball is wide. 3: A row of dominoes is a great way to connect two sections of your chain reaction together. Our first ball started the dominoes f