G.D.
I have a kid who can't take disappointment who is now 30 months and my 2 cents is that they have to learn to control their emotions and it takes a lot of practice. I know some kids who threw one or two tantrums and were done. Mine has thrown a hundred but she keeps getting better at handling herself. I have to provide the boundary though so she can learn plus we also give her advance warning of diappointments we know are coming (like we have to leave the playground). She especially latched onto "one more time." Very important to not lie tho because it prolongs their distress. Do what you say you are going to do and they learn!