Back to square one

After one set of 10 ques I revert back to one question a day format

Here after there will be a set of 10 ques for a week regularly with one question a day

A set of X s consists of a wooden figure which separates, top from bottom, to reveal a smaller figure of the same sort inside, which has, in turn, another figure inside of it, and so on. The number of nested figures is traditionally at least five, but can be much more, up to several dozen with sufficiently fine craftsmanship. Modern dolls often yield an odd number of figures but this is not an absolute rule; the original set, for instance, had an even number. The form is approximately cylindrical, with a rounded top for the head, tapering toward the bottom, with little or no protruding features; the dolls have no hands (except those that are painted). Traditionally the outer layer is a woman, dressed in a sarafan. The figures inside may be of either gender; the smallest, innermost doll is typically a baby lathed from a single small piece of wood (and hence non-opening). The artistry is in the painting of each doll, which can be extremely elaborate. Xs are also called Y .Id X or Y or both

The answer is Matryoshka Dolls or Babushka dolls

a bulls eye from Ashwin