I use straws for small sled kites. Bamboo skewers work too, but they're a little heavier. The roll-up type of bamboo blinds, either new or used, provide hundreds if not thousands of spars for framing small kites. Wooden dowels are reasonably priced too. For more on stories and books click here.
Young children have shorter attention spans and less developed fine motor skills.
You will need to choose a design that is very simple, durable, and sure to fly, no matter how sloppily it is constructed. My favorite design for young children is the sled kite, using the yellow trash bags. I cut out the sails ahead of time and usually tie on the bridles as well. For this kite, the frame is on the front side, facing the flier. My next favorite kite is the flat diamond.