Well what we do in preschool for my students is remind them we're only one person and we can only do one thing at a time. So for example, what I'd say to a student is "I'm only one person, and can only do one thing at a time but I'm almost done and as soon as I am, I will absolutely help you" it took a bit, a few weeks to a month or so, but most of them have learned to wait until I'm not busy to ask me to do something
Hello Rhiannon. Ah the trouble two’s! I have worked with many toddlers and this behaviour is actually very normal. Reminder that your toddler is at the age of figuring out new emotions and boundaries. He doesn’t know what is right and wrong until you show him. I noticed you mentioned ‘my toddler doesn’t understand’ you can use the words that he does understand. For example if he knows words such as ‘sad, uh oh, gentle, no, thank you” try phrasing these words together. For example he places the tablet infront of your face “Uh oh mum cannot see! This makes me feel very sad”. Expressions are key! Pull a sad face! Yes you’ll look silly but it will widen the idea of taking into consideration your emotions. If he throws a tantrum, remind him “I can see you are very angry. This makes me feel sad. Would you like some space? If not I am here for a talk and a cuddle.” It does take time and patience but acknowledging him and his emotions is a great start. It is tough but you got this.
Following, my son is the same