Good idea with hte bobby pins. As a thought for next time, what about cutting a few grooves with a razor saw into the hand to make hte joint more sturdy? not sure exatly how you did it, but that might create a better bonding point as well.
I like he look of the figure, very well done. One of these days, my daughter wants to do super heros. I keep puching it too the back burner till some other things are done.