Chasing the Crystal Rainbow

I spotted a dangling glass crystal spinning lazily right by the window glass, and I just had to leap! I darted straight onto the wide painted ledge, kicking up a tiny swirl of warm dust motes while reaching out both hands to give the crystal a gentle nudge! It started turning in dizzy circles, sending bright flecks of indigo and ruby darting all over the white sill! I scampered after them, pressing my palms against the warm wood to pin a moving rainbow down, but every time I thought I caught one, it zipped straight over my boots and landed on a curled dried leaf beside me!