lark about (
http://definr.com/lark about)
v : play boisterously; "The children frolicked in the garden";
"the gamboling lambs in the meadows"; "The toddlers
romped in the palyroom" [syn:
frolic,
lark,
rollick,
skylark,
disport,
sport,
cavort,
gambol,
frisk,
romp,
run around]