Children are curious, and fans can be dangerous. Look for a fan that has a shield with a closely spaced guard that completely encloses the blades. To be safe, position the fan so that it blows air across your child but is out of their reach.
Some fans are available with sponge blades and no guard. While popular, they are less effective.
There is also the possibility your little one could rip the blades off if they grab it. Score: one point for baby and nil for the fan.
The great thing about these fans is the portability factor, but you don’t want them sliding down the handle of your stroller. You also don’t you want them moving around every time your stroller hits an uneven patch of ground.
A clip that’s strong with some padding is a good option. Also, make sure it opens wide enough to fit on your stroller.