The Mars[DEL: c :DEL] hmallow test was conducted to study the reaction of children's[T1] behaviour[T2] and their self-control. Children from age four to six [DEL: are :DEL] [INS: were :INS] [INS: [T3] :INS] [INS: :INS] placed in an area with a chair, a table, and one marshmallow for five minutes. In the experiment, the psychologists waited [DEL: up :DEL] to see if the children could resist the temptation. The results showed that 1/3 of the children were rewarded with the second marshmallow[INS: , :INS] while 2/3 ate the first one before they could get their second[INS: piece :INS] . The meaning of the experiment demonstrated how the temptation in young children is strong and how the human’s[T4] mentality is easily influenced. [DEL: :DEL] [DEL: :DEL] The aim of this study was to find out how much patience young children have in the age of three till seven. The experiment was conducted in a classroom where the children got the instruction. The patience [DEL: is :DEL] [INS: was :INS] [T5] measured by eating or not eating the marshm[INS: a :INS] [DEL: e :DEL] llow. Eventually[INS: , :INS] there is a tendency that young children do not have [DEL: enough :DEL] patience [INS: enough :INS] to resist eating the marshm[INS: a :INS] [DEL: e :DEL] llow. [DEL: :DEL] The aim of this study was to find out how much patience young children have and how [DEL: can :DEL] they [INS: can :INS] postpone their desires. The experiment was conducted in a classroom where the experiment[INS: e :INS] [DEL: o :DEL] r explained rules to a child. Test subjects were 25 children from 3 to 7 years [DEL: old :DEL] [INS: of age :INS] and the experiment was recorded on hidden camera. The patience was measured by eating or not eating a mars[DEL: c :DEL] hmallow. More than half of subjects failed in this test completely and only three children were able to postpone their desires without touching [DEL: a :DEL] [INS: the :INS] mars[DEL: c :DEL] hmallow. We can say[DEL: , :DEL] that there is a tendency that young children do[INS: not :INS] [DEL: n't :DEL] have [T6] a pati[DEL: n :DEL] ence. The [DEL: main :DEL] aim [T7] of this study was to find out [DEL: how :DEL] [INS: what :INS] [DEL: is :DEL] limit of children's[T8] patience in the age from three to six[INS: is :INS] . The experiment was realized in a closed classroom where [DEL: they :DEL] [INS: children :INS] stayed alone. Before[INS: , :INS] [DEL: it :DEL] they got [INS: the :INS] same instructions about what they [DEL: :DEL] could[INS: not :INS] [DEL: n't :DEL] do. The patience was measured by eating or not eating a mars[DEL: c :DEL] hmallow. The result of this experiment is[DEL: , :DEL] that so young children do[INS: not :INS] [DEL: n't :DEL] have [DEL: a :DEL] pati[DEL: n :DEL] ence[INS: , e :INS] [DEL: . E :DEL] specially, in case of sweets. The purpose of [INS: the :INS] experiment called Mars[DEL: c :DEL] hmallow test is discovering if children are able to resist [DEL: the :DEL] temptation. In [INS: the :INS] experiment[INS: , :INS] [DEL: took part :DEL] twenty children from three to six years[INS: of the :INS] [DEL: , :DEL] same nationality[INS: took part :INS] . All children were instruct[INS: ed :INS] [DEL: ive :DEL] [DEL: to :DEL] not [INS: to :INS] eat candy for ten minutes. As a reward they were promised the whole package. Results showed that older children are more patient, because 90% of them [DEL: were :DEL] succeeded in [DEL: holding :DEL] [INS: complied with :INS] the instructions. On the other hand[INS: , :INS] the youngest children did not meet the guidelines in more than half of the cases and they tasted [INS: the :INS] candy or ate it. The conclusions highlight [DEL: the :DEL] [INS: a :INS] possible relationship between age and the ability to wait. [INS: :INS] [INS: :INS] [INS: All the abstracts are :INS] [INS: very good, well-structured with clear ideas. :INS] [INS: The areas to focus on could include: level of formality, articles, :INS] [INS: and sometimes :INS] [INS: coherence (past and present tenses) :INS] [INS: . :INS] ________________________________ [T1]Grammatically, this is correct, but in academic writing we tend to avoid the “ ´s“ genitive, we prefer other way, such as: children behaviour or behaviour of children [T2]Both, behavior and behaviour are correct, the first on eis the US spelling, the other one the UK spelling. [T3]The present tense was slightly incoherent, that is why it has been changed into “were” [T4]See the comment no.1 [T5]See the comment no.3 [T6]Formal style. [T7]If there is only one aim, the word „main“ is not neceséry. [T8]See the comment no.1.