The butter did not come by any means as quickly as the children expected, even when Fanny took hold; and, tired of waiting for it, they presently began to amuse themselves with sailing the acorn cups which they had picked up in their walk, in the stream which ran through the dairy. It was great fun to launch them at the upper end, and watch them as they floated down, now driven against a butter pot, now passing round it, and at last carried out at the farther end of the dairy.