I like to make little folded paper kites that are cheap. I get copy paper in bright colors and use flagging tape for tails. Crepe paper streamers work well too, but you must be sure there is no moisture on the grass because any water, even just drops, will make the colors run. Plastic flagging tape holds up very well. Instructions to make a Mini Delta Kite can be found on my HubPages site. It is a simple little kite that uses two sheets of paper and some shisk-ka-bob skewers to make the wings and the flagging tape for the tail. You can ususally find the tape in hardware stores or places that have hunting gear.
Homemade paper kites usually don't have a life expectency of more than one season and maybe only one day if it gets in a fight with a tree. Trees eat kites.
I must warn you that kite flying is mildly addicting. There are some truly attractive qualities about it. When you take your little homemade gem out to test it, you may find that, inspite of the simplicity, it is truly a magnificent creation. The first time it grabs the wind and darts away you may find your heart flying heavenward too.