Rubber bands make watermelon explode -- from 'slow mo guys, When you tire of pondering the nature of the universe, ask yourself how many rubber bands it takes to make a watermelon explode. then ask how much you want.How to make a heart shaped egg - anna the red's bento, In my previous post, i did a how to make cube shaped & pyramid shaped hard boiled eggs. (see “how to mold a hard boiled egg”)it was a lot of fun making the molds. Musical instrument crafts for kids: how to make, Home > arts and crafts projects for kids > musical instruments crafts for kids to make. musical instrument crafts for kids: make your own homemade drums, kazoos.