The Bat is a great utility that works really well and fits all our guidelines about a great trick to get. Read on to see why it's so great:

The Effect:

You set a penny in your spectators outstretched hand. You then wave your hands magically over their hands, and you do not touch them. The penny disappears and is replaced by a dime! It changed! They don't feel anything! You then immediately turn your palms face up to show your hands are empty. 

Why you'll like it:

If you were really magic, wouldn't you just wave your hands over something, and make it change? In fact, if you were really magic wouldn't you demonstrate your real magic skills by magicially changing a penny into a dime? Exactly. That's why this is so great. 

What you also get:

For fun, the bat also comes with two brass rings, which you can make stick together or not. When you stick them together they stay connected, but when the spectator tries it, they fail. Although this is fun to do and adds some variety, you'll find yourself doing the penny trick much more often. 

You also get detailed photo instructions that will have you performing this trick in no time. It doesn't take much practice before you'll be fooling your friends with something that appears very close to real magic!

As a variation:

Don't want to change the penny into a dime? Just make the penny vanish with a magical pass of your hands. You can also make other small objects vanish (like bottle caps, nuts, and bolts).