Last week my daughter had this assignment for school: she had to give class about jellyfish. She had to bring extra material, such as dough figures or a cardboard with pictures in it, but no, not my daughter. She had different plans. Using supplies we already had at home, she had this wonderful idea of making a real-like figure. I must tell you, the results were beautiful!
If you want to try for colored jellyfish, use a few drops of food coloring on your bag.
Use your fingers to paint the bag.
Beware of blue fingers!
Turn the bag inside-out. Use the rubber band to mark the division between head and umbrella. The distance depends on the size of your bag, but it's somewhere between 1/2 and 2/3 of the bag.
Once you put the rubber band, it should look like this.
Use another bag to cut out spirals. This is a step for you, since it's a little tricky for kids.
Place the stick on the inside, and secure it with another rubber band. Use this same rubber band to place the spirals in place. (You should take the spirals by the center tip). The spirals are very important for they make pretty tentacles. Do as many as you need (the more, the merrier =).
If you leave the bags unpainted, they will make gorgeous white jellyfish.