It looks like one of those oldest trick in the book type trick...
Is it cool and worth the money

It's not the oldest trick in the book. Cups and Balls is. Hmm, I notice nobody asks if cups and balls is worth it.

It is definatly worth every penny, its awsome, it is so visible, perfect for a beginer or a pro!

Yeah they are awesome. I thought of a pretty good routine wtih them. I will post it in the P.O. section when i get a chance.

P.S. Even though Multiplying sponge balls are great, i like using regualr sponge balls better.

why do you like regualr spounge balls better?

They are non gimmicked and i have a better routine for my regular ones.

I have a a multiplying balls trick, but it uses rubber balls instead of sponge balls.

How good does a trick have to be to be worth $4.99? Seriously though, it is a tremendous effect, IF YOU ARE WILLING TO PUT THE TIME AND EFFORT INTO IT. The nature of the sponge balls make them ideal for the beginner in learning basic ball manipulation. At least, that's what Daryl said on volume one of his World Class Manipulations DVD.

It is a very good trick.

Hey bro, regular sponge balls are my favorite close up and street effect. The reason I love them so much is that they are so compact, you can perform anywhere, and they mush down to allow many to fit in your hand. But my favorite thing about the sponge balls is it happens in the spectators very own hands. They can visually see you place one ball in their hand, and they close their own hand around it, then you place one in your own hand, but when you open your hand, there is no sign of a ball, and they are both in the spectator's hand. Many, many different effects can be achieved. I suggest picking up the 25 tricks with sponge balls video for the basics. Laymen LOVE sponge balls. Later.

-Marcus Forsyth