Bandaids are scary things for a toddler, so you're willing to try any number of tricks to get your little guy to put on one when they get a scraped knee or elbow. My three year old son rightfully was afraid of bandaids for good long while, but the fact that these are colorful and fun looking means that he not long hates getting a scrape because he can run inside and get a bandaid from the box. They're not panaceas - but they make the process a little easier. The monsters are particularly nice, and there's a few different sizes, patterns, and bright colors for your child to choose from.
In terms of how they hold up as bandaids, I've had no issues with adhesion. They even last quite well through handwashings and even sitting in the bathtub without falling off. Can't recommend enough!