Ant-Man costume
Do you really think you need Pym particles? No, you don't really need those to become a character from Avengers. All you need is the costume of the character you usually idolise. Shopzinia is one of the largest suppliers of highest-quality superhero costumes in all sizes, including ant-man. The feeling that 'you can save the world' is always there, suppressed and hidden away. Wearing this costume, you will not only unleash the Good Beast from within, but you will also feel confident to interact with people and perform better (if it's dressup play you are participating in).