I don't set out busy bags for anytime use. I usually use them as 'stations' or for an activity to fill in time when the kids are feeling bored. I prefer it this way because the bags are not overused and The Dragons can still be entertained by them enough for the time I need to get something done.
Many busy bags are also great supplements for our preschool themes and we often make busy bags during our weekly curriculum.
This is another one we have used a couple times. I really like this one for number practice.
The point is to match the number of dots at the bottom of the tentacle to the actual number at the top of the tentacle.
The numbers are not in order so this is good for counting and number recognition.