Communicate with your baby and guide him to establish a correct self-awareness. Guarding your own things and robbing things that don't belong to you are different in nature. As a parent, you should communicate with your baby and guide him to protect his things correctly. At the same time, you should also establish that it is wrong to rob things that don't belong to you unless others agree, so as to establish a preliminary sense of rules for your baby. Talk more, and the baby will get better gradually.
It's not a bad thing to make the baby curious and occasionally satisfy the desire for competition. Children are full of innocence and fun. It is not a bad thing to fully release the baby's nature, meet it once in a while and let him experience failure and success. Just like being a parent, you should pay attention to observing the baby's dynamics, don't be arrogant, don't indulge, be an author, guard and teach your child. Children aged 2-3 have no clear concept of right and wrong. He probably reached for the toy just because he likes it very much. If others don't give it to him, he will be impatient and hurt people. Therefore, we need to teach our children some basic rules patiently, and of course, we should have enough time for them to learn and abide by them slowly.
Every time a child makes a mistake, tell him that it is wrong and give him some suggestions on the right way. For example, if you really want to play with other people's toys, you should ask for their permission first. If someone refuses, you can try to exchange with him or take turns playing with him, so that you can probably play with other people's toys without hurting others and causing yourself trouble. Then practice these scenes with children through games, which may need to be "played" several times, because children can't be expected to change their handling methods once they learn. But "acting" can make children understand and accept more than preaching.