The kids love it. They never complain about the the black covers, (the fact that they are flexible
makes the trick easier to do) and they never think about it not being real peanut butter. After
all, it says "Peanut Butter". You do have to buy two jars of jelly, but only once. Don't open them
and they last forever. And, put a bag in a kids hand with two pieces of bread in it. After the
switch, show the bread with peanut and jelly on it. They'll go wild.