what happened to the magical bag james was carrying?

In Chapter 5, James excitedly runs off with the bag and makes a plan to create the mixture in the kitchen, in secret from his aunts. In his rush to get to the kitchen unnoticed, James trips on the roots of the ancient peach tree and the bag breaks. The tiny green things land on the ground and, as James frantically tries to gather the crystals, they sink into the ground and burrow into the soil.