A Ground Blooming Flower is a firework. It is a pink tube about the size of your thumb. When you light it it spins around like a huge jumping jack. These things get extremely hot. If you drop one in a beer can it will melt right through the can in a couple of seconds. One good use for these is to jam about a 100 bottle rockets in a tube, (sticking out the top of course). Then stick the flower in the middle of the sticks near the bottle rocket wicks. Light the flower. It will set off all 100 of the bottle rockets (making quite a nice display).