A safe mosquito repellant is 2 ounces of water and 2 ounces of pure vanilla extract. Put in a spray bottle. They "hate" the smell. Make sure you use pure vanilla extract and not imitation vanilla extract.
Supplies:
Directions:
Another great mosquito repellant are dryer sheets. Put one in your pocket and one in your socks and they won't bother you.
This is a page about sulfur mosquito repellent. Sulfur powder from a pharmacy may deter mosquitos from biting.
Rather than use chemical based commercial insect repellent products try making your own natural ones. This is a page about natural mosquito repellent recipes.