Anyway -- so they had just turned three, and they came and they were doing this dance they had just made up where they were twirling faster and faster until they tumbled to the ground, laughing with all the glee in the world.
Ну так вот - им только исполнилось три, и они подбежали и начали танцевать танец, который только что придумали, вертясь всё быстрее и быстрее, пока не упали на землю, смеясь от всего сердца.