Mia tapped the mysterious box on the rug. Thump! Something tapped back.
Mia held one finger in the air. She did not move at all.
Mia peered through the little opening. It was dark as a cupboard.
Scritch-scritch came from the box. What could be hiding there?
Mia decided to investigate. She slid one hand into the box.
Something hard and smooth touched Mia’s fingers. BOING! The box hopped away.
Mia followed the hopping box across the rug. She reached inside again.
Pop! A shiny red ball flew out. It bounced off Mia’s pillow.
Plop! The ball landed in Mia’s slipper. Mia laughed and lifted it high.
Mia rolled the red ball toward the box. Tap! A new box-and-ball song began.