I figured this was a slam dunk.  They love the avengers and they steal my watches all the time.  So this seemed a great choice for their first watch and for them to learn to tell time.  But the don't like wearing it much and take it off all the time.  Then they can't find them.  They tell me it is not uncomfortable so I am not sure why they won't leave it on.  Maybe it would be the same with any watch at the moment.  The design is well done and it should work as intended ... if I can get them to keep it on for more than five minutes at a time.