Answer: YOYOS

AnswerCrossword Clue
YOYOSToys with strings attached
YOYOSThey may give you many happy returns
YOYOSGoes up and down and ...
YOYOSToys with strings attached: Hyph.
YOYOSThey can sleep while you watch
YOYOSThey're used in walking the dog
YOYOSShows wild instability
YOYOSDum-dums, to Rickles
YOYOSNerds, to Don Rickles
YOYOSThey come with strings attached
YOYOSStringed playthings
YOYOSToys
YOYOSCertain toys.
YOYOSKids' toys.
YOYOSToys that seem to defy gravity.
YOYOSToys.
YOYOSPlaythings for junior.
YOYOSDuncan toys
YOYOSStringy toys
YOYOSGoes back and forth quickly
YOYOS"Walk the dog" performers
YOYOSDuncan products
YOYOSDuncan's Throw Monkey and Bumble Bee, for two
YOYOSPhilippine toys
YOYOSHandy things that go around the world?
YOYOSHas ups and downs?
YOYOSThey can sleep in midair
YOYOSFools
YOYOSNumskulls
YOYOSString-and-spool toys
YOYOSThey can sleep if you play with them
YOYOSAsses
YOYOSGoes on and off diets, say
YOYOSJerks
YOYOSIdiots
YOYOSShows great instability
YOYOSToys on strings
YOYOSStringed toys
YOYOSThings with strings
YOYOSThey have their ups and downs