The toddler sprang into action when she saw her mum Sarah Millard, who suffers with type one diabetes, collapse on to her bed suffering with hypoglycemia, caused from low blood sugar levels. Brooke Smith, who was in the room at the time, ran downstairs to retrieve energy tablets from her mums handbag and fed them to Sarah - an action which prevented the 23-year-old Huntingdon mother of two from suffering a seizure or going into a coma. Brooke then locked the front door of her house, switched the TV off and even climbed on a washing basket to give her younger sister Miyah, who is only 15 months-old, a drink when she woke momentarily. Her incredible actions have won her praise from staff at staff at her nursery, St Johns Little Learners, but it is Sarah, who cannot speak highly enough of her daughters exploits. The Thames Road resident told The Hunts Post: It is amazing. My handbag was in the living room. She went and got my handbag, got what she was looking for and came into the bedroom. She put the covers over me and tucked me in. When I eventually started to come around, she had locked the front door and turned the TV off. I am really proud of her. Her nursery really praised her and I made her a badge saying Mummys little hero. Since then she has just kept saying Am I your superhero? Sarah, who has had diabetes since she was 13, has experienced hypoglycaemia before, but the latest turn took her completely unawares. Hypoglycaemia can happen suddenly. It can usually be treated by eating or drinking a small amount of glucose-rich food, such as bread, rice, fruit or sweets. Changes of diet or an increase in activity can bring lower blood sugar levels, and a slight change to Sarahs meal-time may have been the cause. Sarah added: I normally get warning signs of feeling shaky. When I am completely gone, it will be like Im drunk. I am not in control and I get really snappy. But this time I was in my bedroom putting some washing away. Brooke had followed me in there. I sat down on the bed, and that was it. I wasnt unconscious, but I wasnt completely aware of what I was doing. I couldnt tell her where my tablets were or what to do. Sarah only learnt of her daughters actions when Brooke showed her what she had done the following morning. She thinks Brooke may have learnt what to do from watching Sarahs mum, Janine Smith, deal with a previous attack. I didnt really think she had been paying much attention. I thought she would have been too young to understand and I hadnt explained it to her, but she must have been watching. Grandmother Janine, 47, of Kent Road, Huntingdon said: I am so proud of Brooke. If it had not been for her invention things could have been a lot worse. She is such a little star.