Spring activity for the kids? (8)
I believe the answer is:
leapfrog
This clue is a double definition.
'spring' is the first definition.
(leapfrog can mean to jump or spring over)
'activity for the kids?' is the second definition.
(playground game)
(Other definitions for leapfrog that I've seen before include "Child's game of jumping over other children" , "Children's game in which one jumps over the other alternately" , "Child's game of jumping over competitors" , "Children's game of jumping over each other" , "Advance by jumping over the opposition" .)