"Oh, I'm going to sail my boat in the brook!" cried Freddie, as soon as he heard the mention of water.

"An' I'll get Rosamond an' give her a ride on your boat!" cried Flossie. Rosamond was a small doll Flossie had brought along.

"All right," agreed Bert, seeing a chance for the smaller twins to play by themselves while he and Nan experimented with the swing. "You get your boat, Freddie, and you get your doll, Flossie, and we'll all go down to the brook and apple tree together."

"Be careful, now!" called Mrs. Bobbsey, as the children ran off.

"We will," they promised. And really they meant to, but you know how it often is—things happen that you can't help.

"There's the swing!" cried Harry, pointing to it dangling from the sturdy limb of the big apple tree. "Daddy put it up for me last week. I'm glad you came. We can have lots of fun in it."

"We want some swings!" cried Freddie.

"After a bit," promised Nan. "Sail your boat now, and give Rosamond a ride, Flossie, and you shall have some swings after that."

The water was more of an attraction for the smaller twins than was the swing, and thus Nan, Bert and Harry had it to themselves. While Flossie and Freddie played with the doll and the boat, the older children took turns seeing how high they could go. Then they would let the "old cat die," that is, stay in the swing, without trying to make it sway, until it came to a dead stop.

"I know what we can do!" cried Bert, when they were tired of swinging.