If you look at this situation from an older mindset, i am above thirty, you would definitely tell them in a very direct and short conversation. Maybe even be playful about making them feel guilty, that’s what most people with more life experience would do.
Shouldn’t Canada do the same? Send the equipment to stabilize and improve social infrastructure, a bit of oil and fertilizer then have Cuba grow the fresh fruits and vegetables that can’t be grown locally during the Canadian winter.