This is the 7998th most frequent Swedish word.
walta
"Walta" is not a standard Swedish word. If you meant "välta," it means "to overturn" or "to topple" in English.
In this sentence, 'walta' is used to describe the action of tumbling or moving energetically in an uncontrolled or playful manner.
Barnen walta över gräset när de leker.
The children tumble over the grass while playing.
Here 'walta' refers to performing controlled gymnastic tumbling movements.
Under gymnastiken lärde sig eleverna att walta korrekt.
During gymnastics, the students learned how to tumble properly.
In this case, 'walta' conveys the playful, chaotic movement of the puppies.