Toddler Trike How Do You Keep A Bandaid On A Toddler's Finger?

How do you keep a bandaid on a toddler's finger? - toddler trike

My son is almost 2nd Sunday, burned at the tip of the right index finger. (Cookout grandparents, his 4 years. Brother pushed against the gate on his tricycle)
They have a cataloger in the second knunkle to the nail. Yeasterday, tore the blister. I cleaned, Neosporin and put a plaster on it. I took it. I have tried everything to comply with, and nothing works. I want to keep covered, at least for a day or two, but nothing has been included in it.
I do not want an infection or is dirty, but you do not know what I can do. Suggestions?

I have tried to pack a few bands. I still have.
Tried colored bands that do not.